[2] | 1 | <?php |
---|
[5509] | 2 | /*************************************************************************** |
---|
| 3 | * Expresso Livre * |
---|
| 4 | * http://www.expressolivre.org * |
---|
| 5 | * -------------------------------------------- * |
---|
| 6 | * This program is free software; you can redistribute it and/or modify it * |
---|
| 7 | * under the terms of the GNU General Public License as published by the * |
---|
| 8 | * Free Software Foundation; either version 2 of the License, or (at your * |
---|
| 9 | * option) any later version. * |
---|
| 10 | \**************************************************************************/ |
---|
| 11 | |
---|
[2] | 12 | // |
---|
| 13 | // +----------------------------------------------------------------------+ |
---|
| 14 | // | <phpXML/> version 1.0 | |
---|
| 15 | // | Copyright (c) 2001 Michael P. Mehl. All rights reserved. | |
---|
| 16 | // +----------------------------------------------------------------------+ |
---|
| 17 | // | Latest releases are available at http://phpxml.org/. For feedback or | |
---|
| 18 | // | bug reports, please contact the author at mpm@phpxml.org. Thanks! | |
---|
| 19 | // +----------------------------------------------------------------------+ |
---|
| 20 | // | The contents of this file are subject to the Mozilla Public License | |
---|
| 21 | // | Version 1.1 (the "License"); you may not use this file except in | |
---|
| 22 | // | compliance with the License. You may obtain a copy of the License at | |
---|
| 23 | // | http://www.mozilla.org/MPL/ | |
---|
| 24 | // | | |
---|
| 25 | // | Software distributed under the License is distributed on an "AS IS" | |
---|
| 26 | // | basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See | |
---|
| 27 | // | the License for the specific language governing rights and | |
---|
| 28 | // | limitations under the License. | |
---|
| 29 | // | | |
---|
| 30 | // | The Original Code is <phpXML/>. | |
---|
| 31 | // | | |
---|
| 32 | // | The Initial Developer of the Original Code is Michael P. Mehl. | |
---|
| 33 | // | Portions created by Michael P. Mehl are Copyright (C) 2001 Michael | |
---|
| 34 | // | P. Mehl. All Rights Reserved. | |
---|
| 35 | // +----------------------------------------------------------------------+ |
---|
| 36 | // | Authors: | |
---|
| 37 | // | Michael P. Mehl <mpm@phpxml.org> | |
---|
| 38 | // +----------------------------------------------------------------------+ |
---|
| 39 | // |
---|
| 40 | |
---|
| 41 | /** |
---|
| 42 | * Class for accessing XML data through the XPath language. |
---|
| 43 | * |
---|
| 44 | * This class offers methods for accessing the nodes of a XML document using |
---|
| 45 | * the XPath language. You can add or remove nodes, set or modify their |
---|
| 46 | * content and their attributes. No additional PHP extensions like DOM XML |
---|
| 47 | * or something similar are required to use these features. |
---|
| 48 | * |
---|
| 49 | * @link http://www.phpxml.org/ Latest release of this class |
---|
| 50 | * @link http://www.w3.org/TR/xpath W3C XPath Recommendation |
---|
| 51 | * @copyright Copyright (c) 2001 Michael P. Mehl. All rights reserved. |
---|
| 52 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 53 | * @version 1.0 (2001-03-08) |
---|
| 54 | * @access public |
---|
| 55 | */ |
---|
| 56 | |
---|
| 57 | class XML |
---|
| 58 | { |
---|
| 59 | /** |
---|
| 60 | * List of all document nodes. |
---|
| 61 | * |
---|
| 62 | * This array contains a list of all document nodes saved as an |
---|
| 63 | * associative array. |
---|
| 64 | * |
---|
| 65 | * @access private |
---|
| 66 | * @var array |
---|
| 67 | */ |
---|
| 68 | var $nodes = array(); |
---|
| 69 | |
---|
| 70 | /** |
---|
| 71 | * List of document node IDs. |
---|
| 72 | * |
---|
| 73 | * This array contains a list of all IDs of all document nodes that |
---|
| 74 | * are used for counting when adding a new node. |
---|
| 75 | * |
---|
| 76 | * @access private |
---|
| 77 | * @var array |
---|
| 78 | */ |
---|
| 79 | var $ids = array(); |
---|
| 80 | |
---|
| 81 | /** |
---|
| 82 | * Current document path. |
---|
| 83 | * |
---|
| 84 | * This variable saves the current path while parsing a XML file and adding |
---|
| 85 | * the nodes being read from the file. |
---|
| 86 | * |
---|
| 87 | * @access private |
---|
| 88 | * @var string |
---|
| 89 | */ |
---|
| 90 | var $path = ""; |
---|
| 91 | |
---|
| 92 | /** |
---|
| 93 | * Current document position. |
---|
| 94 | * |
---|
| 95 | * This variable counts the current document position while parsing a XML |
---|
| 96 | * file and adding the nodes being read from the file. |
---|
| 97 | * |
---|
| 98 | * @access private |
---|
| 99 | * @var int |
---|
| 100 | */ |
---|
| 101 | var $position = 0; |
---|
| 102 | |
---|
| 103 | /** |
---|
| 104 | * Path of the document root. |
---|
| 105 | * |
---|
| 106 | * This string contains the full path to the node that acts as the root |
---|
| 107 | * node of the whole document. |
---|
| 108 | * |
---|
| 109 | * @access private |
---|
| 110 | * @var string |
---|
| 111 | */ |
---|
| 112 | var $root = ""; |
---|
| 113 | |
---|
| 114 | /** |
---|
| 115 | * Current XPath expression. |
---|
| 116 | * |
---|
| 117 | * This string contains the full XPath expression being parsed currently. |
---|
| 118 | * |
---|
| 119 | * @access private |
---|
| 120 | * @var string |
---|
| 121 | */ |
---|
| 122 | var $xpath = ""; |
---|
| 123 | |
---|
| 124 | /** |
---|
| 125 | * List of entities to be converted. |
---|
| 126 | * |
---|
| 127 | * This array contains a list of entities to be converted when an XPath |
---|
| 128 | * expression is evaluated. |
---|
| 129 | * |
---|
| 130 | * @access private |
---|
| 131 | * @var array |
---|
| 132 | */ |
---|
| 133 | var $entities = array ( "&" => "&", "<" => "<", ">" => ">", |
---|
| 134 | "'" => "&apos", '"' => """ ); |
---|
| 135 | |
---|
| 136 | /** |
---|
| 137 | * List of supported XPath axes. |
---|
| 138 | * |
---|
| 139 | * This array contains a list of all valid axes that can be evaluated in an |
---|
| 140 | * XPath expression. |
---|
| 141 | * |
---|
| 142 | * @access private |
---|
| 143 | * @var array |
---|
| 144 | */ |
---|
| 145 | var $axes = array ( "child", "descendant", "parent", "ancestor", |
---|
| 146 | "following-sibling", "preceding-sibling", "following", "preceding", |
---|
| 147 | "attribute", "namespace", "self", "descendant-or-self", |
---|
| 148 | "ancestor-or-self" ); |
---|
| 149 | |
---|
| 150 | /** |
---|
| 151 | * List of supported XPath functions. |
---|
| 152 | * |
---|
| 153 | * This array contains a list of all valid functions that can be evaluated |
---|
| 154 | * in an XPath expression. |
---|
| 155 | * |
---|
| 156 | * @access private |
---|
| 157 | * @var array |
---|
| 158 | */ |
---|
| 159 | var $functions = array ( "last", "position", "count", "id", "name", |
---|
| 160 | "string", "concat", "starts-with", "contains", "substring-before", |
---|
| 161 | "substring-after", "substring", "string-length", "translate", |
---|
| 162 | "boolean", "not", "true", "false", "lang", "number", "sum", "floor", |
---|
| 163 | "ceiling", "round", "text" ); |
---|
| 164 | |
---|
| 165 | /** |
---|
| 166 | * List of supported XPath operators. |
---|
| 167 | * |
---|
| 168 | * This array contains a list of all valid operators that can be evaluated |
---|
| 169 | * in a predicate of an XPath expression. The list is ordered by the |
---|
| 170 | * precedence of the operators (lowest precedence first). |
---|
| 171 | * |
---|
| 172 | * @access private |
---|
| 173 | * @var array |
---|
| 174 | */ |
---|
| 175 | var $operators = array( " or ", " and ", "=", "!=", "<=", "<", ">=", ">", |
---|
| 176 | "+", "-", "*", " div ", " mod " ); |
---|
| 177 | |
---|
| 178 | /** |
---|
| 179 | * Constructor of the class. |
---|
| 180 | * |
---|
| 181 | * This constructor initializes the class and, when a filename is given, |
---|
| 182 | * tries to read and parse the given file. |
---|
| 183 | * |
---|
| 184 | * @access public |
---|
| 185 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 186 | * @param string $file Path and name of the file to read and parsed. |
---|
| 187 | * @see load_file() |
---|
| 188 | */ |
---|
| 189 | function XML ( $file = "" ) |
---|
| 190 | { |
---|
| 191 | // Check whether a file was given. |
---|
| 192 | if ( !empty($file) ) |
---|
| 193 | { |
---|
| 194 | // Load the XML file. |
---|
| 195 | $this->load_file($file); |
---|
| 196 | } |
---|
| 197 | } |
---|
| 198 | |
---|
| 199 | /** |
---|
| 200 | * Reads a file and parses the XML data. |
---|
| 201 | * |
---|
| 202 | * This method reads the content of a XML file, tries to parse its |
---|
| 203 | * content and upon success stores the information retrieved from |
---|
| 204 | * the file into an array. |
---|
| 205 | * |
---|
| 206 | * @access public |
---|
| 207 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 208 | * @param string $file Path and name of the file to be read and parsed. |
---|
| 209 | * @see handle_start_element(), handle_end_element(), |
---|
| 210 | * handle_character_data() |
---|
| 211 | */ |
---|
| 212 | function load_file ( $file ) |
---|
| 213 | { |
---|
| 214 | // Check whether the file exists and is readable. |
---|
| 215 | if ( file_exists($file) && is_readable($file) ) |
---|
| 216 | { |
---|
| 217 | // Read the content of the file. |
---|
| 218 | $content = implode("", file($file)); |
---|
| 219 | |
---|
| 220 | // Check whether content has been read. |
---|
| 221 | if ( !empty($content) ) |
---|
| 222 | { |
---|
| 223 | // Create an XML parser. |
---|
| 224 | $parser = xml_parser_create(); |
---|
| 225 | |
---|
| 226 | // Set the options for parsing the XML data. |
---|
| 227 | xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1); |
---|
| 228 | xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0); |
---|
| 229 | |
---|
| 230 | // Set the object for the parser. |
---|
| 231 | xml_set_object($parser, &$this); |
---|
| 232 | |
---|
| 233 | // Set the element handlers for the parser. |
---|
| 234 | xml_set_element_handler($parser, "handle_start_element", |
---|
| 235 | "handle_end_element"); |
---|
| 236 | xml_set_character_data_handler($parser, |
---|
| 237 | "handle_character_data"); |
---|
| 238 | |
---|
| 239 | // Parse the XML file. |
---|
| 240 | if ( !xml_parse($parser, $content, true) ) |
---|
| 241 | { |
---|
| 242 | // Display an error message. |
---|
| 243 | $this->display_error("XML error in file %s, line %d: %s", |
---|
| 244 | $file, xml_get_current_line_number($parser), |
---|
| 245 | xml_error_string(xml_get_error_code($parser))); |
---|
| 246 | } |
---|
| 247 | |
---|
| 248 | // Free the parser. |
---|
| 249 | xml_parser_free($parser); |
---|
| 250 | } |
---|
| 251 | } |
---|
| 252 | else |
---|
| 253 | { |
---|
| 254 | // Display an error message. |
---|
| 255 | $this->display_error("File %s could not be found or read.", $file); |
---|
| 256 | } |
---|
| 257 | } |
---|
| 258 | |
---|
| 259 | /** |
---|
| 260 | * Generates a XML file with the content of the current document. |
---|
| 261 | * |
---|
| 262 | * This method creates a string containing the XML data being read |
---|
| 263 | * and modified by this class before. This string can be used to save |
---|
| 264 | * a modified document back to a file or doing other nice things with |
---|
| 265 | * it. |
---|
| 266 | * |
---|
| 267 | * @access public |
---|
| 268 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 269 | * @param array $highlight Array containing a list of full document |
---|
| 270 | * paths of nodes to be highlighted by <font>...</font> tags |
---|
| 271 | * in the generated XML string. |
---|
| 272 | * @param string $root While doing a recursion with this method, this |
---|
| 273 | * parameter is used for internal purpose. |
---|
| 274 | * @param int $level While doing a recursion with this method, this |
---|
| 275 | * parameter is used for internal purpose. |
---|
| 276 | * @return string The returned string contains well-formed XML data |
---|
| 277 | * representing the content of this document. |
---|
| 278 | * @see load_file(), evaluate(), get_content() |
---|
| 279 | */ |
---|
| 280 | function get_file ( $highlight = array(), $root = "", $level = 0 ) |
---|
| 281 | { |
---|
| 282 | // Create a string to save the generated XML data. |
---|
| 283 | $xml = ""; |
---|
| 284 | |
---|
| 285 | // Create two strings containing the tags for highlighting a node. |
---|
| 286 | $highlight_start = "<font color=\"#FF0000\"><b>"; |
---|
| 287 | $highlight_end = "</b></font>"; |
---|
| 288 | |
---|
| 289 | // Generate a string to be displayed before the tags. |
---|
| 290 | $before = ""; |
---|
| 291 | |
---|
| 292 | // Calculate the amount of whitespaces to display. |
---|
[7655] | 293 | for ( $i = 0; $i < ( $level * 2 ); ++$i ) |
---|
[2] | 294 | { |
---|
| 295 | // Add a whitespaces to the string. |
---|
| 296 | $before .= " "; |
---|
| 297 | } |
---|
| 298 | |
---|
| 299 | // Check whether a root node is given. |
---|
| 300 | if ( empty($root) ) |
---|
| 301 | { |
---|
| 302 | // Set it to the document root. |
---|
| 303 | $root = $this->root; |
---|
| 304 | } |
---|
| 305 | |
---|
| 306 | // Check whether the node is selected. |
---|
| 307 | $selected = in_array($root, $highlight); |
---|
| 308 | |
---|
| 309 | // Now add the whitespaces to the XML data. |
---|
| 310 | $xml .= $before; |
---|
| 311 | |
---|
| 312 | // Check whether the node is selected. |
---|
| 313 | if ( $selected ) |
---|
| 314 | { |
---|
| 315 | // Add the highlight code to the XML data. |
---|
| 316 | $xml .= $highlight_start; |
---|
| 317 | } |
---|
| 318 | |
---|
| 319 | // Now open the tag. |
---|
| 320 | $xml .= "<".$this->nodes[$root]["name"]; |
---|
| 321 | |
---|
| 322 | // Check whether there are attributes for this node. |
---|
| 323 | if ( count($this->nodes[$root]["attributes"]) > 0 ) |
---|
| 324 | { |
---|
| 325 | // Run through all attributes. |
---|
| 326 | foreach ( $this->nodes[$root]["attributes"] as $key => $value ) |
---|
| 327 | { |
---|
| 328 | // Check whether this attribute is highlighted. |
---|
| 329 | if ( in_array($root."/attribute::".$key, $highlight) ) |
---|
| 330 | { |
---|
| 331 | // Add the highlight code to the XML data. |
---|
| 332 | $xml .= $highlight_start; |
---|
| 333 | } |
---|
| 334 | |
---|
| 335 | // Add the attribute to the XML data. |
---|
| 336 | $xml .= " ".$key."=\"".trim(stripslashes($value))."\""; |
---|
| 337 | |
---|
| 338 | // Check whether this attribute is highlighted. |
---|
| 339 | if ( in_array($root."/attribute::".$key, $highlight) ) |
---|
| 340 | { |
---|
| 341 | // Add the highlight code to the XML data. |
---|
| 342 | $xml .= $highlight_end; |
---|
| 343 | } |
---|
| 344 | } |
---|
| 345 | } |
---|
| 346 | |
---|
| 347 | // Check whether the node contains character data or has children. |
---|
| 348 | if ( empty($this->nodes[$root]["text"]) && |
---|
| 349 | !isset($this->nodes[$root]["children"]) ) |
---|
| 350 | { |
---|
| 351 | // Add the end to the tag. |
---|
| 352 | $xml .= "/"; |
---|
| 353 | } |
---|
| 354 | |
---|
| 355 | // Close the tag. |
---|
| 356 | $xml .= ">\n"; |
---|
| 357 | |
---|
| 358 | // Check whether the node is selected. |
---|
| 359 | if ( $selected ) |
---|
| 360 | { |
---|
| 361 | // Add the highlight code to the XML data. |
---|
| 362 | $xml .= $highlight_end; |
---|
| 363 | } |
---|
| 364 | |
---|
| 365 | // Check whether the node contains character data. |
---|
| 366 | if ( !empty($this->nodes[$root]["text"]) ) |
---|
| 367 | { |
---|
| 368 | // Add the character data to the XML data. |
---|
| 369 | $xml .= $before." ".$this->nodes[$root]["text"]."\n"; |
---|
| 370 | } |
---|
| 371 | |
---|
| 372 | // Check whether the node has children. |
---|
| 373 | if ( isset($this->nodes[$root]["children"]) ) |
---|
| 374 | { |
---|
| 375 | // Run through all children with different names. |
---|
| 376 | foreach ( $this->nodes[$root]["children"] as $child => $pos ) |
---|
| 377 | { |
---|
| 378 | // Run through all children with the same name. |
---|
[7655] | 379 | for ( $i = 1; $i <= $pos; ++$i ) |
---|
[2] | 380 | { |
---|
| 381 | // Generate the full path of the child. |
---|
| 382 | $fullchild = $root."/".$child."[".$i."]"; |
---|
| 383 | |
---|
| 384 | // Add the child's XML data to the existing data. |
---|
| 385 | $xml .= $this->get_file($highlight, $fullchild, |
---|
| 386 | $level + 1); |
---|
| 387 | } |
---|
| 388 | } |
---|
| 389 | } |
---|
| 390 | |
---|
| 391 | // Check whether there are attributes for this node. |
---|
| 392 | if ( !empty($this->nodes[$root]["text"]) || |
---|
| 393 | isset($this->nodes[$root]["children"]) ) |
---|
| 394 | { |
---|
| 395 | // Add the whitespaces to the XML data. |
---|
| 396 | $xml .= $before; |
---|
| 397 | |
---|
| 398 | // Check whether the node is selected. |
---|
| 399 | if ( $selected ) |
---|
| 400 | { |
---|
| 401 | // Add the highlight code to the XML data. |
---|
| 402 | $xml .= $highlight_start; |
---|
| 403 | } |
---|
| 404 | |
---|
| 405 | // Add the closing tag. |
---|
| 406 | $xml .= "</".$this->nodes[$root]["name"].">"; |
---|
| 407 | |
---|
| 408 | // Check whether the node is selected. |
---|
| 409 | if ( $selected ) |
---|
| 410 | { |
---|
| 411 | // Add the highlight code to the XML data. |
---|
| 412 | $xml .= $highlight_end; |
---|
| 413 | } |
---|
| 414 | |
---|
| 415 | // Add a linebreak. |
---|
| 416 | $xml .= "\n"; |
---|
| 417 | } |
---|
| 418 | |
---|
| 419 | // Return the XML data. |
---|
| 420 | return $xml; |
---|
| 421 | } |
---|
| 422 | |
---|
| 423 | /** |
---|
| 424 | * Adds a new node to the XML document. |
---|
| 425 | * |
---|
| 426 | * This method adds a new node to the tree of nodes of the XML document |
---|
| 427 | * being handled by this class. The new node is created according to the |
---|
| 428 | * parameters passed to this method. |
---|
| 429 | * |
---|
| 430 | * @access public |
---|
| 431 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 432 | * @param string $content Full path of the parent, to which the new |
---|
| 433 | * node should be added as a child. |
---|
| 434 | * @param string $name Name of the new node. |
---|
| 435 | * @return string The string returned by this method will contain the |
---|
| 436 | * full document path of the created node. |
---|
| 437 | * @see remove_node(), evaluate() |
---|
| 438 | */ |
---|
| 439 | function add_node ( $context, $name ) |
---|
| 440 | { |
---|
| 441 | // Check whether a name for this element is already set. |
---|
| 442 | if ( empty($this->root) ) |
---|
| 443 | { |
---|
| 444 | // Use this tag as the root element. |
---|
| 445 | $this->root = "/".$name."[1]"; |
---|
| 446 | } |
---|
| 447 | |
---|
| 448 | // Calculate the full path for this element. |
---|
| 449 | $path = $context."/".$name; |
---|
| 450 | |
---|
| 451 | // Set the relative context and the position. |
---|
| 452 | $position = ++$this->ids[$path]; |
---|
| 453 | $relative = $name."[".$position."]"; |
---|
| 454 | |
---|
| 455 | // Calculate the full path. |
---|
| 456 | $fullpath = $context."/".$relative; |
---|
| 457 | |
---|
| 458 | // Calculate the context position, which is the position of this |
---|
| 459 | // element within elements of the same name in the parent node. |
---|
| 460 | $this->nodes[$fullpath]["context-position"] = $position; |
---|
| 461 | |
---|
| 462 | // Calculate the position for the following and preceding axis |
---|
| 463 | // detection. |
---|
| 464 | $this->nodes[$fullpath]["document-position"] = |
---|
| 465 | $this->nodes[$context]["document-position"] + 1; |
---|
| 466 | |
---|
| 467 | // Save the information about the node. |
---|
| 468 | $this->nodes[$fullpath]["name"] = $name; |
---|
| 469 | $this->nodes[$fullpath]["text"] = ""; |
---|
| 470 | $this->nodes[$fullpath]["parent"] = $context; |
---|
| 471 | |
---|
| 472 | // Add this element to the element count array. |
---|
| 473 | if ( !$this->nodes[$context]["children"][$name] ) |
---|
| 474 | { |
---|
| 475 | // Set the default name. |
---|
| 476 | $this->nodes[$context]["children"][$name] = 1; |
---|
| 477 | } |
---|
| 478 | else |
---|
| 479 | { |
---|
| 480 | // Calculate the name. |
---|
| 481 | $this->nodes[$context]["children"][$name] = |
---|
| 482 | $this->nodes[$context]["children"][$name] + 1; |
---|
| 483 | } |
---|
| 484 | |
---|
| 485 | // Return the path of the new node. |
---|
| 486 | return $fullpath; |
---|
| 487 | } |
---|
| 488 | |
---|
| 489 | /** |
---|
| 490 | * Removes a node from the XML document. |
---|
| 491 | * |
---|
| 492 | * This method removes a node from the tree of nodes of the XML document. |
---|
| 493 | * If the node is a document node, all children of the node and its |
---|
| 494 | * character data will be removed. If the node is an attribute node, |
---|
| 495 | * only this attribute will be removed, the node to which the attribute |
---|
| 496 | * belongs as well as its children will remain unmodified. |
---|
| 497 | * |
---|
| 498 | * @access public |
---|
| 499 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 500 | * @param string $node Full path of the node to be removed. |
---|
| 501 | * @see add_node(), evaluate() |
---|
| 502 | */ |
---|
| 503 | function remove_node ( $node ) |
---|
| 504 | { |
---|
| 505 | // Check whether the node is an attribute node. |
---|
[5912] | 506 | if ( preg_match('/\/attribute::/', $node) ) |
---|
[2] | 507 | { |
---|
| 508 | // Get the path to the attribute node's parent. |
---|
| 509 | $parent = $this->prestr($node, "/attribute::"); |
---|
| 510 | |
---|
| 511 | // Get the name of the attribute. |
---|
| 512 | $attribute = $this->afterstr($node, "/attribute::"); |
---|
| 513 | |
---|
| 514 | // Check whether the attribute exists. |
---|
| 515 | if ( isset($this->nodes[$parent]["attributes"][$attribute]) ) |
---|
| 516 | { |
---|
| 517 | // Create a new array. |
---|
| 518 | $new = array(); |
---|
| 519 | |
---|
| 520 | // Run through the existing attributes. |
---|
| 521 | foreach ( $this->nodes[$parent]["attributes"] |
---|
| 522 | as $key => $value ) |
---|
| 523 | { |
---|
| 524 | // Check whether it's the attribute to remove. |
---|
| 525 | if ( $key != $attribute ) |
---|
| 526 | { |
---|
| 527 | // Add it to the new array again. |
---|
| 528 | $new[$key] = $value; |
---|
| 529 | } |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | // Save the new attributes. |
---|
| 533 | $this->nodes[$parent]["attributes"] = $new; |
---|
| 534 | } |
---|
| 535 | } |
---|
| 536 | else |
---|
| 537 | { |
---|
| 538 | // Create an associative array, which contains information about |
---|
| 539 | // all nodes that required to be renamed. |
---|
| 540 | $rename = array(); |
---|
| 541 | |
---|
| 542 | // Get the name, the parent and the siblings of current node. |
---|
| 543 | $name = $this->nodes[$node]["name"]; |
---|
| 544 | $parent = $this->nodes[$node]["parent"]; |
---|
| 545 | $siblings = $this->nodes[$parent]["children"][$name]; |
---|
| 546 | |
---|
| 547 | // Decrease the number of children. |
---|
| 548 | $this->nodes[$parent]["children"][$name]--; |
---|
| 549 | |
---|
| 550 | // Create a counter for renumbering the siblings. |
---|
| 551 | $counter = 1; |
---|
| 552 | |
---|
| 553 | // Now run through the siblings. |
---|
[7655] | 554 | for ( $i = 1; $i <= $siblings; ++$i ) |
---|
[2] | 555 | { |
---|
| 556 | // Create the name of the sibling. |
---|
| 557 | $sibling = $parent."/".$name."[".$i."]"; |
---|
| 558 | |
---|
| 559 | // Check whether it's the name of the current node. |
---|
| 560 | if ( $sibling != $node ) |
---|
| 561 | { |
---|
| 562 | // Create the new name for the sibling. |
---|
| 563 | $new = $parent."/".$name."[".$counter."]"; |
---|
| 564 | |
---|
| 565 | // Increase the counter. |
---|
[7655] | 566 | ++$counter; |
---|
[2] | 567 | |
---|
| 568 | // Add the old and the new name to the list of nodes |
---|
| 569 | // to be renamed. |
---|
| 570 | $rename[$sibling] = $new; |
---|
| 571 | } |
---|
| 572 | } |
---|
| 573 | |
---|
| 574 | // Create an array for saving the new node-list. |
---|
| 575 | $nodes = array(); |
---|
| 576 | |
---|
| 577 | // Now run through through the existing nodes. |
---|
| 578 | foreach ( $this->nodes as $name => $values ) |
---|
| 579 | { |
---|
| 580 | // Check the position of the path of the node to be deleted |
---|
| 581 | // in the path of the current node. |
---|
| 582 | $position = strpos($name, $node); |
---|
| 583 | |
---|
| 584 | // Check whether it's not the node to be deleted. |
---|
| 585 | if ( $position === false ) |
---|
| 586 | { |
---|
| 587 | // Run through the array of nodes to be renamed. |
---|
| 588 | foreach ( $rename as $old => $new ) |
---|
| 589 | { |
---|
| 590 | // Check whether this node and it's parent requires to |
---|
| 591 | // be renamed. |
---|
| 592 | $name = str_replace($old, $new, $name); |
---|
| 593 | $values["parent"] = str_replace($old, $new, |
---|
| 594 | $values["parent"]); |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | // Add the node to the list of nodes. |
---|
| 598 | $nodes[$name] = $values; |
---|
| 599 | } |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | // Save the new array of nodes. |
---|
| 603 | $this->nodes = $nodes; |
---|
| 604 | } |
---|
| 605 | } |
---|
| 606 | |
---|
| 607 | /** |
---|
| 608 | * Add content to a node. |
---|
| 609 | * |
---|
| 610 | * This method adds content to a node. If it's an attribute node, then |
---|
| 611 | * the value of the attribute will be set, otherwise the character data of |
---|
| 612 | * the node will be set. The content is appended to existing content, |
---|
| 613 | * so nothing will be overwritten. |
---|
| 614 | * |
---|
| 615 | * @access public |
---|
| 616 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 617 | * @param string $path Full document path of the node. |
---|
| 618 | * @param string $value String containing the content to be added. |
---|
| 619 | * @see get_content(), evaluate() |
---|
| 620 | */ |
---|
| 621 | function add_content ( $path, $value ) |
---|
| 622 | { |
---|
| 623 | // Check whether it's an attribute node. |
---|
[5912] | 624 | if ( preg_match('/\/attribute::/', $path) ) |
---|
[2] | 625 | { |
---|
| 626 | // Get the path to the attribute node's parent. |
---|
| 627 | $parent = $this->prestr($path, "/attribute::"); |
---|
| 628 | |
---|
| 629 | // Get the parent node. |
---|
| 630 | $parent = $this->nodes[$parent]; |
---|
| 631 | |
---|
| 632 | // Get the name of the attribute. |
---|
| 633 | $attribute = $this->afterstr($path, "/attribute::"); |
---|
| 634 | |
---|
| 635 | // Set the attribute. |
---|
| 636 | $parent["attributes"][$attribute] .= $value; |
---|
| 637 | } |
---|
| 638 | else |
---|
| 639 | { |
---|
| 640 | // Set the character data of the node. |
---|
| 641 | $this->nodes[$path]["text"] .= $value; |
---|
| 642 | } |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | /** |
---|
| 646 | * Set the content of a node. |
---|
| 647 | * |
---|
| 648 | * This method sets the content of a node. If it's an attribute node, then |
---|
| 649 | * the value of the attribute will be set, otherwise the character data of |
---|
| 650 | * the node will be set. Existing content will be overwritten. |
---|
| 651 | * |
---|
| 652 | * @access public |
---|
| 653 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 654 | * @param string $path Full document path of the node. |
---|
| 655 | * @param string $value String containing the content to be set. |
---|
| 656 | * @see get_content(), evaluate() |
---|
| 657 | */ |
---|
| 658 | function set_content ( $path, $value ) |
---|
| 659 | { |
---|
| 660 | // Check whether it's an attribute node. |
---|
[5912] | 661 | if ( preg_match('/\/attribute::/', $path) ) |
---|
[2] | 662 | { |
---|
| 663 | // Get the path to the attribute node's parent. |
---|
| 664 | $parent = $this->prestr($path, "/attribute::"); |
---|
| 665 | |
---|
| 666 | // Get the parent node. |
---|
| 667 | $parent = $this->nodes[$parent]; |
---|
| 668 | |
---|
| 669 | // Get the name of the attribute. |
---|
| 670 | $attribute = $this->afterstr($path, "/attribute::"); |
---|
| 671 | |
---|
| 672 | // Set the attribute. |
---|
| 673 | $parent["attributes"][$attribute] = $value; |
---|
| 674 | } |
---|
| 675 | else |
---|
| 676 | { |
---|
| 677 | // Set the character data of the node. |
---|
| 678 | $this->nodes[$path]["text"] = $value; |
---|
| 679 | } |
---|
| 680 | } |
---|
| 681 | |
---|
| 682 | /** |
---|
| 683 | * Retrieves the content of a node. |
---|
| 684 | * |
---|
| 685 | * This method retrieves the content of a node. If it's an attribute |
---|
| 686 | * node, then the value of the attribute will be retrieved, otherwise |
---|
| 687 | * it'll be the character data of the node. |
---|
| 688 | * |
---|
| 689 | * @access public |
---|
| 690 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 691 | * @param string $path Full document path of the node, from which the |
---|
| 692 | * content should be retrieved. |
---|
| 693 | * @return string The returned string contains either the value or the |
---|
| 694 | * character data of the node. |
---|
| 695 | * @see set_content(), evaluate() |
---|
| 696 | */ |
---|
| 697 | function get_content ( $path ) |
---|
| 698 | { |
---|
| 699 | // Check whether it's an attribute node. |
---|
[5912] | 700 | if ( preg_match('/\/attribute::/', $path) ) |
---|
[2] | 701 | { |
---|
| 702 | // Get the path to the attribute node's parent. |
---|
| 703 | $parent = $this->prestr($path, "/attribute::"); |
---|
| 704 | |
---|
| 705 | // Get the parent node. |
---|
| 706 | $parent = $this->nodes[$parent]; |
---|
| 707 | |
---|
| 708 | // Get the name of the attribute. |
---|
| 709 | $attribute = $this->afterstr($path, "/attribute::"); |
---|
| 710 | |
---|
| 711 | // Get the attribute. |
---|
| 712 | $attribute = $parent["attributes"][$attribute]; |
---|
| 713 | |
---|
| 714 | // Return the value of the attribute. |
---|
| 715 | return $attribute; |
---|
| 716 | } |
---|
| 717 | else |
---|
| 718 | { |
---|
| 719 | // Return the cdata of the node. |
---|
| 720 | return stripslashes($this->nodes[$path]["text"]); |
---|
| 721 | } |
---|
| 722 | } |
---|
| 723 | |
---|
| 724 | /** |
---|
| 725 | * Add attributes to a node. |
---|
| 726 | * |
---|
| 727 | * This method adds attributes to a node. Existing attributes will not be |
---|
| 728 | * overwritten. |
---|
| 729 | * |
---|
| 730 | * @access public |
---|
| 731 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 732 | * @param string $path Full document path of the node, the attributes |
---|
| 733 | * should be added to. |
---|
| 734 | * @param array $attributes Associative array containing the new |
---|
| 735 | * attributes for the node. |
---|
| 736 | * @see set_content(), get_content() |
---|
| 737 | */ |
---|
| 738 | function add_attributes ( $path, $attributes ) |
---|
| 739 | { |
---|
| 740 | // Add the attributes to the node. |
---|
| 741 | $this->nodes[$path]["attributes"] = array_merge($attributes, |
---|
| 742 | $this->nodes[$path]["attributes"]); |
---|
| 743 | } |
---|
| 744 | |
---|
| 745 | /** |
---|
| 746 | * Sets the attributes of a node. |
---|
| 747 | * |
---|
| 748 | * This method sets the attributes of a node and overwrites all existing |
---|
| 749 | * attributes by doing this. |
---|
| 750 | * |
---|
| 751 | * @access public |
---|
| 752 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 753 | * @param string $path Full document path of the node, the attributes |
---|
| 754 | * of which should be set. |
---|
| 755 | * @param array $attributes Associative array containing the new |
---|
| 756 | * attributes for the node. |
---|
| 757 | * @see set_content(), get_content() |
---|
| 758 | */ |
---|
| 759 | function set_attributes ( $path, $attributes ) |
---|
| 760 | { |
---|
| 761 | // Set the attributes of the node. |
---|
| 762 | $this->nodes[$path]["attributes"] = $attributes; |
---|
| 763 | } |
---|
| 764 | |
---|
| 765 | /** |
---|
| 766 | * Retrieves a list of all attributes of a node. |
---|
| 767 | * |
---|
| 768 | * This method retrieves a list of all attributes of the node specified in |
---|
| 769 | * the argument. |
---|
| 770 | * |
---|
| 771 | * @access public |
---|
| 772 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 773 | * @param string $path Full document path of the node, from which the |
---|
| 774 | * list of attributes should be retrieved. |
---|
| 775 | * @return array The returned associative array contains the all |
---|
| 776 | * attributes of the specified node. |
---|
| 777 | * @see get_content(), $nodes, $ids |
---|
| 778 | */ |
---|
| 779 | function get_attributes ( $path ) |
---|
| 780 | { |
---|
| 781 | // Return the attributes of the node. |
---|
| 782 | return $this->nodes[$path]["attributes"]; |
---|
| 783 | } |
---|
| 784 | |
---|
| 785 | /** |
---|
| 786 | * Retrieves the name of a document node. |
---|
| 787 | * |
---|
| 788 | * This method retrieves the name of document node specified in the |
---|
| 789 | * argument. |
---|
| 790 | * |
---|
| 791 | * @access public |
---|
| 792 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 793 | * @param string $path Full document path of the node, from which the |
---|
| 794 | * name should be retrieved. |
---|
| 795 | * @return string The returned array contains the name of the specified |
---|
| 796 | * node. |
---|
| 797 | * @see get_content(), $nodes, $ids |
---|
| 798 | */ |
---|
| 799 | function get_name ( $path ) |
---|
| 800 | { |
---|
| 801 | // Return the name of the node. |
---|
| 802 | return $this->nodes[$path]["name"]; |
---|
| 803 | } |
---|
| 804 | |
---|
| 805 | /** |
---|
| 806 | * Evaluates an XPath expression. |
---|
| 807 | * |
---|
| 808 | * This method tries to evaluate an XPath expression by parsing it. A |
---|
| 809 | * XML document has to be read before this method is able to work. |
---|
| 810 | * |
---|
| 811 | * @access public |
---|
| 812 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 813 | * @param string $path XPath expression to be evaluated. |
---|
| 814 | * @param string $context Full path of a document node, starting |
---|
| 815 | * from which the XPath expression should be evaluated. |
---|
| 816 | * @return array The returned array contains a list of the full |
---|
| 817 | * document paths of all nodes that match the evaluated |
---|
| 818 | * XPath expression. |
---|
| 819 | * @see $nodes, $ids |
---|
| 820 | */ |
---|
| 821 | function evaluate ( $path, $context = "" ) |
---|
| 822 | { |
---|
| 823 | // Remove slashes and quote signs. |
---|
| 824 | $path = stripslashes($path); |
---|
| 825 | $path = str_replace("\"", "", $path); |
---|
| 826 | $path = str_replace("'", "", $path); |
---|
| 827 | |
---|
| 828 | // Split the paths into different paths. |
---|
| 829 | $paths = $this->split_paths($path); |
---|
| 830 | |
---|
| 831 | // Create an empty set to save the result. |
---|
| 832 | $result = array(); |
---|
| 833 | |
---|
| 834 | // Run through all paths. |
---|
| 835 | foreach ( $paths as $path ) |
---|
| 836 | { |
---|
| 837 | // Trim the path. |
---|
| 838 | $path = trim($path); |
---|
| 839 | |
---|
| 840 | // Save the current path. |
---|
| 841 | $this->xpath = $path; |
---|
| 842 | |
---|
| 843 | // Convert all entities. |
---|
| 844 | $path = strtr($path, array_flip($this->entities)); |
---|
| 845 | |
---|
| 846 | // Split the path at every slash. |
---|
| 847 | $steps = $this->split_steps($path); |
---|
| 848 | |
---|
| 849 | // Check whether the first element is empty. |
---|
| 850 | if ( empty($steps[0]) ) |
---|
| 851 | { |
---|
| 852 | // Remove the first and empty element. |
---|
| 853 | array_shift($steps); |
---|
| 854 | } |
---|
| 855 | |
---|
| 856 | // Start to evaluate the steps. |
---|
| 857 | $nodes = $this->evaluate_step($context, $steps); |
---|
| 858 | |
---|
| 859 | // Remove duplicated nodes. |
---|
| 860 | $nodes = array_unique($nodes); |
---|
| 861 | |
---|
| 862 | // Add the nodes to the result set. |
---|
| 863 | $result = array_merge($result, $nodes); |
---|
| 864 | } |
---|
| 865 | |
---|
| 866 | // Return the result. |
---|
| 867 | return $result; |
---|
| 868 | } |
---|
| 869 | |
---|
| 870 | /** |
---|
| 871 | * Handles opening XML tags while parsing. |
---|
| 872 | * |
---|
| 873 | * While parsing a XML document for each opening tag this method is |
---|
| 874 | * called. It'll add the tag found to the tree of document nodes. |
---|
| 875 | * |
---|
| 876 | * @access private |
---|
| 877 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 878 | * @param int $parser Handler for accessing the current XML parser. |
---|
| 879 | * @param string $name Name of the opening tag found in the document. |
---|
| 880 | * @param array $attributes Associative array containing a list of |
---|
| 881 | * all attributes of the tag found in the document. |
---|
| 882 | * @see handle_end_element(), handle_character_data(), $nodes, $ids |
---|
| 883 | */ |
---|
| 884 | function handle_start_element ( $parser, $name, $attributes ) |
---|
| 885 | { |
---|
| 886 | // Add a node. |
---|
| 887 | $this->path = $this->add_node($this->path, $name); |
---|
| 888 | |
---|
| 889 | // Set the attributes. |
---|
| 890 | $this->set_attributes($this->path, $attributes); |
---|
| 891 | } |
---|
| 892 | |
---|
| 893 | /** |
---|
| 894 | * Handles closing XML tags while parsing. |
---|
| 895 | * |
---|
| 896 | * While parsing a XML document for each closing tag this method is |
---|
| 897 | * called. |
---|
| 898 | * |
---|
| 899 | * @access private |
---|
| 900 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 901 | * @param int $parser Handler for accessing the current XML parser. |
---|
| 902 | * @param string $name Name of the closing tag found in the document. |
---|
| 903 | * @see handle_start_element(), handle_character_data(), $nodes, $ids |
---|
| 904 | */ |
---|
| 905 | function handle_end_element ( $parser, $name ) |
---|
| 906 | { |
---|
| 907 | // Jump back to the parent element. |
---|
| 908 | $this->path = substr($this->path, 0, strrpos($this->path, "/")); |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | /** |
---|
| 912 | * Handles character data while parsing. |
---|
| 913 | * |
---|
| 914 | * While parsing a XML document for each character data this method |
---|
| 915 | * is called. It'll add the character data to the document tree. |
---|
| 916 | * |
---|
| 917 | * @access private |
---|
| 918 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 919 | * @param int $parser Handler for accessing the current XML parser. |
---|
| 920 | * @param string $text Character data found in the document. |
---|
| 921 | * @see handle_start_element(), handle_end_element(), $nodes, $ids |
---|
| 922 | */ |
---|
| 923 | function handle_character_data ( $parser, $text ) |
---|
| 924 | { |
---|
| 925 | // Replace entities. |
---|
| 926 | $text = strtr($text, $this->entities); |
---|
| 927 | |
---|
| 928 | // Save the text. |
---|
| 929 | $this->add_content($this->path, addslashes(trim($text))); |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | /** |
---|
| 933 | * Splits an XPath expression into its different expressions. |
---|
| 934 | * |
---|
| 935 | * This method splits an XPath expression. Each expression can consists of |
---|
| 936 | * list of expression being separated from each other by a | character. |
---|
| 937 | * |
---|
| 938 | * @access private |
---|
| 939 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 940 | * @param string $expression The complete expression to be splitted |
---|
| 941 | * into its different expressions. |
---|
| 942 | * @return array The array returned from this method contains a list |
---|
| 943 | * of all expressions found in the expression passed to this |
---|
| 944 | * method as a parameter. |
---|
| 945 | * @see evalute() |
---|
| 946 | */ |
---|
| 947 | function split_paths ( $expression ) |
---|
| 948 | { |
---|
| 949 | // Create an empty array. |
---|
| 950 | $paths = array(); |
---|
| 951 | |
---|
| 952 | // Save the position of the slash. |
---|
| 953 | $position = -1; |
---|
| 954 | |
---|
| 955 | // Run through the expression. |
---|
| 956 | do |
---|
| 957 | { |
---|
| 958 | // Search for a slash. |
---|
| 959 | $position = $this->search_string($expression, "|"); |
---|
| 960 | |
---|
| 961 | // Check whether a | was found. |
---|
| 962 | if ( $position >= 0 ) |
---|
| 963 | { |
---|
| 964 | // Get the left part of the expression. |
---|
| 965 | $left = substr($expression, 0, $position); |
---|
| 966 | $right = substr($expression, $position + 1); |
---|
| 967 | |
---|
| 968 | // Add the left value to the steps. |
---|
| 969 | $paths[] = $left; |
---|
| 970 | |
---|
| 971 | // Reduce the expression to the right part. |
---|
| 972 | $expression = $right; |
---|
| 973 | } |
---|
| 974 | } |
---|
| 975 | while ( $position > -1 ); |
---|
| 976 | |
---|
| 977 | // Add the remaing expression to the list of steps. |
---|
| 978 | $paths[] = $expression; |
---|
| 979 | |
---|
| 980 | // Return the steps. |
---|
| 981 | return $paths; |
---|
| 982 | } |
---|
| 983 | |
---|
| 984 | /** |
---|
| 985 | * Splits an XPath expression into its different steps. |
---|
| 986 | * |
---|
| 987 | * This method splits an XPath expression. Each expression can consists of |
---|
| 988 | * list of steps being separated from each other by a / character. |
---|
| 989 | * |
---|
| 990 | * @access private |
---|
| 991 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 992 | * @param string $expression The complete expression to be splitted |
---|
| 993 | * into its different steps. |
---|
| 994 | * @return array The array returned from this method contains a list |
---|
| 995 | * of all steps found in the expression passed to this |
---|
| 996 | * method as a parameter. |
---|
| 997 | * @see evalute() |
---|
| 998 | */ |
---|
| 999 | function split_steps ( $expression ) |
---|
| 1000 | { |
---|
| 1001 | // Create an empty array. |
---|
| 1002 | $steps = array(); |
---|
| 1003 | |
---|
| 1004 | // Replace a double slashes, because they'll cause problems otherwise. |
---|
| 1005 | $expression = str_replace("//@", "/descendant::*/@", $expression); |
---|
| 1006 | $expression = str_replace("//", "/descendant::", $expression); |
---|
| 1007 | |
---|
| 1008 | // Save the position of the slash. |
---|
| 1009 | $position = -1; |
---|
| 1010 | |
---|
| 1011 | // Run through the expression. |
---|
| 1012 | do |
---|
| 1013 | { |
---|
| 1014 | // Search for a slash. |
---|
| 1015 | $position = $this->search_string($expression, "/"); |
---|
| 1016 | |
---|
| 1017 | // Check whether a slash was found. |
---|
| 1018 | if ( $position >= 0 ) |
---|
| 1019 | { |
---|
| 1020 | // Get the left part of the expression. |
---|
| 1021 | $left = substr($expression, 0, $position); |
---|
| 1022 | $right = substr($expression, $position + 1); |
---|
| 1023 | |
---|
| 1024 | // Add the left value to the steps. |
---|
| 1025 | $steps[] = $left; |
---|
| 1026 | |
---|
| 1027 | // Reduce the expression to the right part. |
---|
| 1028 | $expression = $right; |
---|
| 1029 | } |
---|
| 1030 | } |
---|
| 1031 | while ( $position > -1 ); |
---|
| 1032 | |
---|
| 1033 | // Add the remaing expression to the list of steps. |
---|
| 1034 | $steps[] = $expression; |
---|
| 1035 | |
---|
| 1036 | // Return the steps. |
---|
| 1037 | return $steps; |
---|
| 1038 | } |
---|
| 1039 | |
---|
| 1040 | /** |
---|
| 1041 | * Retrieves axis information from an XPath expression step. |
---|
| 1042 | * |
---|
| 1043 | * This method tries to extract the name of the axis and its node-test |
---|
| 1044 | * from a given step of an XPath expression at a given node. |
---|
| 1045 | * |
---|
| 1046 | * @access private |
---|
| 1047 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1048 | * @param string $step String containing a step of an XPath expression. |
---|
| 1049 | * @param string $node Full document path of the node on which the |
---|
| 1050 | * step is executed. |
---|
| 1051 | * @return array This method returns an array containing information |
---|
| 1052 | * about the axis found in the step. |
---|
| 1053 | * @see evaluate_step() |
---|
| 1054 | */ |
---|
| 1055 | function get_axis ( $step, $node ) |
---|
| 1056 | { |
---|
| 1057 | // Create an array to save the axis information. |
---|
| 1058 | $axis = array( |
---|
| 1059 | "axis" => "", |
---|
| 1060 | "node-test" => "", |
---|
| 1061 | "predicate" => array() |
---|
| 1062 | ); |
---|
| 1063 | |
---|
| 1064 | // Check whether there are predicates. |
---|
[5912] | 1065 | if ( preg_match('/\[/', $step) ) |
---|
[2] | 1066 | { |
---|
| 1067 | // Get the predicates. |
---|
| 1068 | $predicates = substr($step, strpos($step, "[")); |
---|
| 1069 | |
---|
| 1070 | // Reduce the step. |
---|
| 1071 | $step = $this->prestr($step, "["); |
---|
| 1072 | |
---|
| 1073 | // Try to split the predicates. |
---|
| 1074 | $predicates = str_replace("][", "]|[", $predicates); |
---|
| 1075 | $predicates = explode("|", $predicates); |
---|
| 1076 | |
---|
| 1077 | // Run through all predicates. |
---|
| 1078 | foreach ( $predicates as $predicate ) |
---|
| 1079 | { |
---|
| 1080 | // Remove the brackets. |
---|
| 1081 | $predicate = substr($predicate, 1, strlen($predicate) - 2); |
---|
| 1082 | |
---|
| 1083 | // Add the predicate to the list of predicates. |
---|
| 1084 | $axis["predicate"][] = $predicate; |
---|
| 1085 | } |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | // Check whether the axis is given in plain text. |
---|
| 1089 | if ( $this->search_string($step, "::") > -1 ) |
---|
| 1090 | { |
---|
| 1091 | // Split the step to extract axis and node-test. |
---|
| 1092 | $axis["axis"] = $this->prestr($step, "::"); |
---|
| 1093 | $axis["node-test"] = $this->afterstr($step, "::"); |
---|
| 1094 | } |
---|
| 1095 | else |
---|
| 1096 | { |
---|
| 1097 | // Check whether the step is empty. |
---|
| 1098 | if ( empty($step) ) |
---|
| 1099 | { |
---|
| 1100 | // Set it to the default value. |
---|
| 1101 | $step = "."; |
---|
| 1102 | } |
---|
| 1103 | |
---|
| 1104 | // Check whether is an abbreviated syntax. |
---|
| 1105 | if ( $step == "*" ) |
---|
| 1106 | { |
---|
| 1107 | // Use the child axis and select all children. |
---|
| 1108 | $axis["axis"] = "child"; |
---|
| 1109 | $axis["node-test"] = "*"; |
---|
| 1110 | } |
---|
[5912] | 1111 | elseif ( preg_match('/\(/', $step) ) |
---|
[2] | 1112 | { |
---|
| 1113 | // Check whether it's a function. |
---|
| 1114 | if ( $this->is_function($this->prestr($step, "(")) ) |
---|
| 1115 | { |
---|
| 1116 | // Get the position of the first bracket. |
---|
| 1117 | $start = strpos($step, "("); |
---|
| 1118 | $end = strpos($step, ")", $start); |
---|
| 1119 | |
---|
| 1120 | // Get everything before, between and after the brackets. |
---|
| 1121 | $before = substr($step, 0, $start); |
---|
| 1122 | $between = substr($step, $start + 1, $end - $start - 1); |
---|
| 1123 | $after = substr($step, $end + 1); |
---|
| 1124 | |
---|
| 1125 | // Trim each string. |
---|
| 1126 | $before = trim($before); |
---|
| 1127 | $between = trim($between); |
---|
| 1128 | $after = trim($after); |
---|
| 1129 | |
---|
| 1130 | // Save the evaluated function. |
---|
| 1131 | $axis["axis"] = "function"; |
---|
| 1132 | $axis["node-test"] = $this->evaluate_function($before, |
---|
| 1133 | $between, $node); |
---|
| 1134 | } |
---|
| 1135 | else |
---|
| 1136 | { |
---|
| 1137 | // Use the child axis and a function. |
---|
| 1138 | $axis["axis"] = "child"; |
---|
| 1139 | $axis["node-test"] = $step; |
---|
| 1140 | } |
---|
| 1141 | } |
---|
[5928] | 1142 | elseif ( preg_match('/^@/i', $step) ) |
---|
[2] | 1143 | { |
---|
| 1144 | // Use the attribute axis and select the attribute. |
---|
| 1145 | $axis["axis"] = "attribute"; |
---|
| 1146 | $axis["node-test"] = substr($step, 1); |
---|
| 1147 | } |
---|
[5928] | 1148 | elseif ( preg_match('/\]$/i', $step) ) |
---|
[2] | 1149 | { |
---|
| 1150 | // Use the child axis and select a position. |
---|
| 1151 | $axis["axis"] = "child"; |
---|
| 1152 | $axis["node-test"] = substr($step, strpos($step, "[")); |
---|
| 1153 | } |
---|
| 1154 | elseif ( $step == "." ) |
---|
| 1155 | { |
---|
| 1156 | // Select the self axis. |
---|
| 1157 | $axis["axis"] = "self"; |
---|
| 1158 | $axis["node-test"] = "*"; |
---|
| 1159 | } |
---|
| 1160 | elseif ( $step == ".." ) |
---|
| 1161 | { |
---|
| 1162 | // Select the parent axis. |
---|
| 1163 | $axis["axis"] = "parent"; |
---|
| 1164 | $axis["node-test"] = "*"; |
---|
| 1165 | } |
---|
[5912] | 1166 | elseif ( preg_match('/^[a-zA-Z0-9\-_]+$/', $step) ) |
---|
[2] | 1167 | { |
---|
| 1168 | // Select the child axis and the child. |
---|
| 1169 | $axis["axis"] = "child"; |
---|
| 1170 | $axis["node-test"] = $step; |
---|
| 1171 | } |
---|
| 1172 | else |
---|
| 1173 | { |
---|
| 1174 | // Use the child axis and a name. |
---|
| 1175 | $axis["axis"] = "child"; |
---|
| 1176 | $axis["node-test"] = $step; |
---|
| 1177 | } |
---|
| 1178 | } |
---|
| 1179 | |
---|
| 1180 | // Check whether it's a valid axis. |
---|
| 1181 | if ( !in_array($axis["axis"], array_merge($this->axes, |
---|
| 1182 | array("function"))) ) |
---|
| 1183 | { |
---|
| 1184 | // Display an error message. |
---|
| 1185 | $this->display_error("While parsing an XPath expression, in ". |
---|
| 1186 | "the step \"%s\" the invalid axis \"%s\" was found.", |
---|
| 1187 | str_replace($step, "<b>".$step."</b>", $this->xpath),# |
---|
| 1188 | $axis["axis"]); |
---|
| 1189 | } |
---|
| 1190 | |
---|
| 1191 | // Return the axis information. |
---|
| 1192 | return $axis; |
---|
| 1193 | } |
---|
| 1194 | |
---|
| 1195 | /** |
---|
| 1196 | * Looks for a string within another string. |
---|
| 1197 | * |
---|
| 1198 | * This method looks for a string within another string. Brackets in the |
---|
| 1199 | * string the method is looking through will be respected, which means that |
---|
| 1200 | * only if the string the method is looking for is located outside of |
---|
| 1201 | * brackets, the search will be successful. |
---|
| 1202 | * |
---|
| 1203 | * @access private |
---|
| 1204 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1205 | * @param string $term String in which the search shall take place. |
---|
| 1206 | * @param string $expression String that should be searched. |
---|
| 1207 | * @return int This method returns -1 if no string was found, otherwise |
---|
| 1208 | * the offset at which the string was found. |
---|
| 1209 | * @see evaluate_step() |
---|
| 1210 | */ |
---|
| 1211 | function search_string ( $term, $expression ) |
---|
| 1212 | { |
---|
| 1213 | // Create a new counter for the brackets. |
---|
| 1214 | $brackets = 0; |
---|
| 1215 | |
---|
| 1216 | // Run through the string. |
---|
[7655] | 1217 | for ( $i = 0; $i < strlen($term); ++$i ) |
---|
[2] | 1218 | { |
---|
| 1219 | // Get the character at the position of the string. |
---|
| 1220 | $character = substr($term, $i, 1); |
---|
| 1221 | |
---|
| 1222 | // Check whether it's a breacket. |
---|
| 1223 | if ( ( $character == "(" ) || ( $character == "[" ) ) |
---|
| 1224 | { |
---|
| 1225 | // Increase the number of brackets. |
---|
[7655] | 1226 | ++$brackets; |
---|
[2] | 1227 | } |
---|
| 1228 | elseif ( ( $character == ")" ) || ( $character == "]" ) ) |
---|
| 1229 | { |
---|
| 1230 | // Decrease the number of brackets. |
---|
| 1231 | $brackets--; |
---|
| 1232 | } |
---|
| 1233 | elseif ( $brackets == 0 ) |
---|
| 1234 | { |
---|
| 1235 | // Check whether we can find the expression at this index. |
---|
| 1236 | if ( substr($term, $i, strlen($expression)) == $expression ) |
---|
| 1237 | { |
---|
| 1238 | // Return the current index. |
---|
| 1239 | return $i; |
---|
| 1240 | } |
---|
| 1241 | } |
---|
| 1242 | } |
---|
| 1243 | |
---|
| 1244 | // Check whether we had a valid number of brackets. |
---|
| 1245 | if ( $brackets != 0 ) |
---|
| 1246 | { |
---|
| 1247 | // Display an error message. |
---|
| 1248 | $this->display_error("While parsing an XPath expression, in the ". |
---|
| 1249 | "predicate \"%s\", there was an invalid number of brackets.", |
---|
| 1250 | str_replace($term, "<b>".$term."</b>", $this->xpath)); |
---|
| 1251 | } |
---|
| 1252 | |
---|
| 1253 | // Nothing was found. |
---|
| 1254 | return (-1); |
---|
| 1255 | } |
---|
| 1256 | |
---|
| 1257 | /** |
---|
| 1258 | * Checks for a valid function name. |
---|
| 1259 | * |
---|
| 1260 | * This method check whether an expression contains a valid name of an |
---|
| 1261 | * XPath function. |
---|
| 1262 | * |
---|
| 1263 | * @access private |
---|
| 1264 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1265 | * @param string $expression Name of the function to be checked. |
---|
| 1266 | * @return boolean This method returns true if the given name is a valid |
---|
| 1267 | * XPath function name, otherwise false. |
---|
| 1268 | * @see evaluate() |
---|
| 1269 | */ |
---|
| 1270 | function is_function ( $expression ) |
---|
| 1271 | { |
---|
| 1272 | // Check whether it's in the list of supported functions. |
---|
| 1273 | if ( in_array($expression, $this->functions) ) |
---|
| 1274 | { |
---|
| 1275 | // It's a function. |
---|
| 1276 | return true; |
---|
| 1277 | } |
---|
| 1278 | else |
---|
| 1279 | { |
---|
| 1280 | // It's not a function. |
---|
| 1281 | return false; |
---|
| 1282 | } |
---|
| 1283 | } |
---|
| 1284 | |
---|
| 1285 | /** |
---|
| 1286 | * Evaluates a step of an XPath expression. |
---|
| 1287 | * |
---|
| 1288 | * This method tries to evaluate a step from an XPath expression at a |
---|
| 1289 | * specific context. |
---|
| 1290 | * |
---|
| 1291 | * @access private |
---|
| 1292 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1293 | * @param string $context Full document path of the context from |
---|
| 1294 | * which starting the step should be evaluated. |
---|
| 1295 | * @param array $steps Array containing the remaining steps of the |
---|
| 1296 | * current XPath expression. |
---|
| 1297 | * @return array This method returns an array containing all nodes |
---|
| 1298 | * that are the result of evaluating the given XPath step. |
---|
| 1299 | * @see evaluate() |
---|
| 1300 | */ |
---|
| 1301 | function evaluate_step ( $context, $steps ) |
---|
| 1302 | { |
---|
| 1303 | // Create an empty array for saving the nodes found. |
---|
| 1304 | $nodes = array(); |
---|
| 1305 | |
---|
| 1306 | // Check whether the context is an array of contexts. |
---|
| 1307 | if ( is_array($context) ) |
---|
| 1308 | { |
---|
| 1309 | // Run through the array. |
---|
| 1310 | foreach ( $context as $path ) |
---|
| 1311 | { |
---|
| 1312 | // Call this method for this single path. |
---|
| 1313 | $nodes = array_merge($nodes, |
---|
| 1314 | $this->evaluate_step($path, $steps)); |
---|
| 1315 | } |
---|
| 1316 | } |
---|
| 1317 | else |
---|
| 1318 | { |
---|
| 1319 | // Get this step. |
---|
| 1320 | $step = array_shift($steps); |
---|
| 1321 | |
---|
| 1322 | // Create an array to save the new contexts. |
---|
| 1323 | $contexts = array(); |
---|
| 1324 | |
---|
| 1325 | // Get the axis of the current step. |
---|
| 1326 | $axis = $this->get_axis($step, $context); |
---|
| 1327 | |
---|
| 1328 | // Check whether it's a function. |
---|
| 1329 | if ( $axis["axis"] == "function" ) |
---|
| 1330 | { |
---|
| 1331 | // Check whether an array was return by the function. |
---|
| 1332 | if ( is_array($axis["node-test"]) ) |
---|
| 1333 | { |
---|
| 1334 | // Add the results to the list of contexts. |
---|
| 1335 | $contexts = array_merge($contexts, $axis["node-test"]); |
---|
| 1336 | } |
---|
| 1337 | else |
---|
| 1338 | { |
---|
| 1339 | // Add the result to the list of contexts. |
---|
| 1340 | $contexts[] = $axis["node-test"]; |
---|
| 1341 | } |
---|
| 1342 | } |
---|
| 1343 | else |
---|
| 1344 | { |
---|
| 1345 | // Create the name of the method. |
---|
| 1346 | $method = "handle_axis_".str_replace("-", "_", $axis["axis"]); |
---|
| 1347 | |
---|
| 1348 | // Check whether the axis handler is defined. |
---|
| 1349 | if ( !method_exists(&$this, $method) ) |
---|
| 1350 | { |
---|
| 1351 | // Display an error message. |
---|
| 1352 | $this->display_error("While parsing an XPath expression, ". |
---|
| 1353 | "the axis \"%s\" could not be handled, because this ". |
---|
| 1354 | "version does not support this axis.", $axis["axis"]); |
---|
| 1355 | } |
---|
| 1356 | |
---|
| 1357 | // Perform an axis action. |
---|
| 1358 | $contexts = call_user_method($method, &$this, $axis, $context); |
---|
| 1359 | |
---|
| 1360 | // Check whether there are predicates. |
---|
| 1361 | if ( count($axis["predicate"]) > 0 ) |
---|
| 1362 | { |
---|
| 1363 | // Check whether each node fits the predicates. |
---|
| 1364 | $contexts = $this->check_predicates($contexts, |
---|
| 1365 | $axis["predicate"]); |
---|
| 1366 | } |
---|
| 1367 | } |
---|
| 1368 | |
---|
| 1369 | // Check whether there are more steps left. |
---|
| 1370 | if ( count($steps) > 0 ) |
---|
| 1371 | { |
---|
| 1372 | // Continue the evaluation of the next steps. |
---|
| 1373 | $nodes = $this->evaluate_step($contexts, $steps); |
---|
| 1374 | } |
---|
| 1375 | else |
---|
| 1376 | { |
---|
| 1377 | // Save the found contexts. |
---|
| 1378 | $nodes = $contexts; |
---|
| 1379 | } |
---|
| 1380 | } |
---|
| 1381 | |
---|
| 1382 | // Return the nodes found. |
---|
| 1383 | return $nodes; |
---|
| 1384 | } |
---|
| 1385 | |
---|
| 1386 | /** |
---|
| 1387 | * Evaluates an XPath function |
---|
| 1388 | * |
---|
| 1389 | * This method evaluates a given XPath function with its arguments on a |
---|
| 1390 | * specific node of the document. |
---|
| 1391 | * |
---|
| 1392 | * @access private |
---|
| 1393 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1394 | * @param string $function Name of the function to be evaluated. |
---|
| 1395 | * @param string $arguments String containing the arguments being |
---|
| 1396 | * passed to the function. |
---|
| 1397 | * @param string $node Full path to the document node on which the |
---|
| 1398 | * function should be evaluated. |
---|
| 1399 | * @return mixed This method returns the result of the evaluation of |
---|
| 1400 | * the function. Depending on the function the type of the |
---|
| 1401 | * return value can be different. |
---|
| 1402 | * @see evaluate() |
---|
| 1403 | */ |
---|
| 1404 | function evaluate_function ( $function, $arguments, $node ) |
---|
| 1405 | { |
---|
| 1406 | // Remove whitespaces. |
---|
| 1407 | $function = trim($function); |
---|
| 1408 | $arguments = trim($arguments); |
---|
| 1409 | |
---|
| 1410 | // Create the name of the function handling function. |
---|
| 1411 | $method = "handle_function_".str_replace("-", "_", $function); |
---|
| 1412 | |
---|
| 1413 | // Check whether the function handling function is available. |
---|
| 1414 | if ( !method_exists(&$this, $method) ) |
---|
| 1415 | { |
---|
| 1416 | // Display an error message. |
---|
| 1417 | $this->display_error("While parsing an XPath expression, ". |
---|
| 1418 | "the function \"%s\" could not be handled, because this ". |
---|
| 1419 | "version does not support this function.", $function); |
---|
| 1420 | } |
---|
| 1421 | |
---|
| 1422 | // Return the result of the function. |
---|
| 1423 | return call_user_method($method, &$this, $node, $arguments); |
---|
| 1424 | } |
---|
| 1425 | |
---|
| 1426 | /** |
---|
| 1427 | * Evaluates a predicate on a node. |
---|
| 1428 | * |
---|
| 1429 | * This method tries to evaluate a predicate on a given node. |
---|
| 1430 | * |
---|
| 1431 | * @access private |
---|
| 1432 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1433 | * @param string $node Full path of the node on which the predicate |
---|
| 1434 | * should be evaluated. |
---|
| 1435 | * @param string $predicate String containing the predicate expression |
---|
| 1436 | * to be evaluated. |
---|
| 1437 | * @return mixed This method is called recursively. The first call should |
---|
| 1438 | * return a boolean value, whether the node matches the predicate |
---|
| 1439 | * or not. Any call to the method being made during the recursion |
---|
| 1440 | * may also return other types for further processing. |
---|
| 1441 | * @see evaluate() |
---|
| 1442 | */ |
---|
| 1443 | function evaluate_predicate ( $node, $predicate ) |
---|
| 1444 | { |
---|
| 1445 | // Set the default position and the type of the operator. |
---|
| 1446 | $position = 0; |
---|
| 1447 | $operator = ""; |
---|
| 1448 | |
---|
| 1449 | // Run through all operators and try to find them. |
---|
| 1450 | foreach ( $this->operators as $expression ) |
---|
| 1451 | { |
---|
| 1452 | // Check whether a position was already found. |
---|
| 1453 | if ( $position <= 0 ) |
---|
| 1454 | { |
---|
| 1455 | // Try to find the operator. |
---|
| 1456 | $position = $this->search_string($predicate, $expression); |
---|
| 1457 | |
---|
| 1458 | // Check whether a operator was found. |
---|
| 1459 | if ( $position > 0 ) |
---|
| 1460 | { |
---|
| 1461 | // Save the operator. |
---|
| 1462 | $operator = $expression; |
---|
| 1463 | |
---|
| 1464 | // Check whether it's the equal operator. |
---|
| 1465 | if ( $operator == "=" ) |
---|
| 1466 | { |
---|
| 1467 | // Also look for other operators containing the |
---|
| 1468 | // equal sign. |
---|
| 1469 | if ( $this->search_string($predicate, "!=") == |
---|
| 1470 | ( $position - 1 ) ) |
---|
| 1471 | { |
---|
| 1472 | // Get the new position. |
---|
| 1473 | $position = $this->search_string($predicate, "!="); |
---|
| 1474 | |
---|
| 1475 | // Save the new operator. |
---|
| 1476 | $operator = "!="; |
---|
| 1477 | } |
---|
| 1478 | if ( $this->search_string($predicate, "<=") == |
---|
| 1479 | ( $position - 1 ) ) |
---|
| 1480 | { |
---|
| 1481 | // Get the new position. |
---|
| 1482 | $position = $this->search_string($predicate, "<="); |
---|
| 1483 | |
---|
| 1484 | // Save the new operator. |
---|
| 1485 | $operator = "<="; |
---|
| 1486 | } |
---|
| 1487 | if ( $this->search_string($predicate, ">=") == |
---|
| 1488 | ( $position - 1 ) ) |
---|
| 1489 | { |
---|
| 1490 | // Get the new position. |
---|
| 1491 | $position = $this->search_string($predicate, ">="); |
---|
| 1492 | |
---|
| 1493 | // Save the new operator. |
---|
| 1494 | $operator = ">="; |
---|
| 1495 | } |
---|
| 1496 | } |
---|
| 1497 | } |
---|
| 1498 | } |
---|
| 1499 | } |
---|
| 1500 | |
---|
| 1501 | // Check whether the operator is a - sign. |
---|
| 1502 | if ( $operator == "-" ) |
---|
| 1503 | { |
---|
| 1504 | // Check whether it's not a function containing a - in its name. |
---|
| 1505 | foreach ( $this->functions as $function ) |
---|
| 1506 | { |
---|
| 1507 | // Check whether there's a - sign in the function name. |
---|
[5912] | 1508 | if ( preg_match('/-/', $function) ) |
---|
[2] | 1509 | { |
---|
| 1510 | // Get the position of the - in the function name. |
---|
| 1511 | $sign = strpos($function, "-"); |
---|
| 1512 | |
---|
| 1513 | // Extract a substring from the predicate. |
---|
| 1514 | $sub = substr($predicate, $position - $sign, |
---|
| 1515 | strlen($function)); |
---|
| 1516 | |
---|
| 1517 | // Check whether it's the function. |
---|
| 1518 | if ( $sub == $function ) |
---|
| 1519 | { |
---|
| 1520 | // Don't use the operator. |
---|
| 1521 | $operator = ""; |
---|
| 1522 | $position = -1; |
---|
| 1523 | } |
---|
| 1524 | } |
---|
| 1525 | } |
---|
| 1526 | } |
---|
| 1527 | elseif ( $operator == "*" ) |
---|
| 1528 | { |
---|
| 1529 | // Get some substrings. |
---|
| 1530 | $character = substr($predicate, $position - 1, 1); |
---|
| 1531 | $attribute = substr($predicate, $position - 11, 11); |
---|
| 1532 | |
---|
| 1533 | // Check whether it's an attribute selection. |
---|
| 1534 | if ( ( $character == "@" ) || ( $attribute == "attribute::" ) ) |
---|
| 1535 | { |
---|
| 1536 | // Don't use the operator. |
---|
| 1537 | $operator = ""; |
---|
| 1538 | $position = -1; |
---|
| 1539 | } |
---|
| 1540 | } |
---|
| 1541 | |
---|
| 1542 | // Check whether an operator was found. |
---|
| 1543 | if ( $position > 0 ) |
---|
| 1544 | { |
---|
| 1545 | // Get the left and the right part of the expression. |
---|
| 1546 | $left = substr($predicate, 0, $position); |
---|
| 1547 | $right = substr($predicate, $position + strlen($operator)); |
---|
| 1548 | |
---|
| 1549 | // Remove whitespaces. |
---|
| 1550 | $left = trim($left); |
---|
| 1551 | $right = trim($right); |
---|
| 1552 | |
---|
| 1553 | // Evaluate the left and the right part. |
---|
| 1554 | $left = $this->evaluate_predicate($node, $left); |
---|
| 1555 | $right = $this->evaluate_predicate($node, $right); |
---|
| 1556 | |
---|
| 1557 | // Check the kind of operator. |
---|
| 1558 | switch ( $operator ) |
---|
| 1559 | { |
---|
| 1560 | case " or ": |
---|
| 1561 | // Return the two results connected by an "or". |
---|
| 1562 | return ( $left or $right ); |
---|
| 1563 | |
---|
| 1564 | case " and ": |
---|
| 1565 | // Return the two results connected by an "and". |
---|
| 1566 | return ( $left and $right ); |
---|
| 1567 | |
---|
| 1568 | case "=": |
---|
| 1569 | // Compare the two results. |
---|
| 1570 | return ( $left == $right ); |
---|
| 1571 | |
---|
| 1572 | case "!=": |
---|
| 1573 | // Check whether the two results are not equal. |
---|
| 1574 | return ( $left != $right ); |
---|
| 1575 | |
---|
| 1576 | case "<=": |
---|
| 1577 | // Compare the two results. |
---|
| 1578 | return ( $left <= $right ); |
---|
| 1579 | |
---|
| 1580 | case "<": |
---|
| 1581 | // Compare the two results. |
---|
| 1582 | return ( $left < $right ); |
---|
| 1583 | |
---|
| 1584 | case ">=": |
---|
| 1585 | // Compare the two results. |
---|
| 1586 | return ( $left >= $right ); |
---|
| 1587 | |
---|
| 1588 | case ">": |
---|
| 1589 | // Compare the two results. |
---|
| 1590 | return ( $left > $right ); |
---|
| 1591 | |
---|
| 1592 | case "+": |
---|
| 1593 | // Return the result by adding one result to the other. |
---|
| 1594 | return ( $left + $right ); |
---|
| 1595 | |
---|
| 1596 | case "-": |
---|
| 1597 | // Return the result by decrease one result by the other. |
---|
| 1598 | return ( $left - $right ); |
---|
| 1599 | |
---|
| 1600 | case "*": |
---|
| 1601 | // Return a multiplication of the two results. |
---|
| 1602 | return ( $left * $right ); |
---|
| 1603 | |
---|
| 1604 | case " div ": |
---|
| 1605 | // Return a division of the two results. |
---|
| 1606 | if ( $right == 0 ) |
---|
| 1607 | { |
---|
| 1608 | // Display an error message. |
---|
| 1609 | $this->display_error("While parsing an XPath ". |
---|
| 1610 | "predicate, a error due a division by zero ". |
---|
| 1611 | "occured."); |
---|
| 1612 | } |
---|
| 1613 | else |
---|
| 1614 | { |
---|
| 1615 | // Return the result of the division. |
---|
| 1616 | return ( $left / $right ); |
---|
| 1617 | } |
---|
| 1618 | break; |
---|
| 1619 | |
---|
| 1620 | case " mod ": |
---|
| 1621 | // Return a modulo of the two results. |
---|
| 1622 | return ( $left % $right ); |
---|
| 1623 | } |
---|
| 1624 | } |
---|
| 1625 | |
---|
| 1626 | // Check whether the predicate is a function. |
---|
[5912] | 1627 | if ( preg_match('/\(/', $predicate) ) |
---|
[2] | 1628 | { |
---|
| 1629 | // Get the position of the first bracket. |
---|
| 1630 | $start = strpos($predicate, "("); |
---|
| 1631 | $end = strpos($predicate, ")", $start); |
---|
| 1632 | |
---|
| 1633 | // Get everything before, between and after the brackets. |
---|
| 1634 | $before = substr($predicate, 0, $start); |
---|
| 1635 | $between = substr($predicate, $start + 1, $end - $start - 1); |
---|
| 1636 | $after = substr($predicate, $end + 1); |
---|
| 1637 | |
---|
| 1638 | // Trim each string. |
---|
| 1639 | $before = trim($before); |
---|
| 1640 | $between = trim($between); |
---|
| 1641 | $after = trim($after); |
---|
| 1642 | |
---|
| 1643 | // Check whether there's something after the bracket. |
---|
| 1644 | if ( !empty($after) ) |
---|
| 1645 | { |
---|
| 1646 | // Display an error message. |
---|
| 1647 | $this->display_error("While parsing an XPath expression ". |
---|
| 1648 | "there was found an error in the predicate \"%s\", ". |
---|
| 1649 | "because after a closing bracket there was found ". |
---|
| 1650 | "something unknown.", str_replace($predicate, |
---|
| 1651 | "<b>".$predicate."</b>", $this->xpath)); |
---|
| 1652 | } |
---|
| 1653 | |
---|
| 1654 | // Check whether it's a function. |
---|
| 1655 | if ( empty($before) && empty($after) ) |
---|
| 1656 | { |
---|
| 1657 | // Evaluate the content of the brackets. |
---|
| 1658 | return $this->evaluate_predicate($node, $between); |
---|
| 1659 | } |
---|
| 1660 | elseif ( $this->is_function($before) ) |
---|
| 1661 | { |
---|
| 1662 | // Return the evaluated function. |
---|
| 1663 | return $this->evaluate_function($before, $between, $node); |
---|
| 1664 | } |
---|
| 1665 | else |
---|
| 1666 | { |
---|
| 1667 | // Display an error message. |
---|
| 1668 | $this->display_error("While parsing a predicate in an XPath ". |
---|
| 1669 | "expression, a function \"%s\" was found, which is not ". |
---|
| 1670 | "yet supported by the parser.", str_replace($before, |
---|
| 1671 | "<b>".$before."</b>", $this->xpath)); |
---|
| 1672 | } |
---|
| 1673 | } |
---|
| 1674 | |
---|
| 1675 | // Check whether the predicate is just a digit. |
---|
[5912] | 1676 | if ( preg_match('/^[0-9]+(\.[0-9]+)?$/', $predicate) || |
---|
| 1677 | preg_match('/^\.[0-9]+$/', $predicate) ) |
---|
[2] | 1678 | { |
---|
| 1679 | // Return the value of the digit. |
---|
| 1680 | return doubleval($predicate); |
---|
| 1681 | } |
---|
| 1682 | |
---|
| 1683 | // Check whether it's an XPath expression. |
---|
| 1684 | $result = $this->evaluate($predicate, $node); |
---|
| 1685 | if ( count($result) > 0 ) |
---|
| 1686 | { |
---|
| 1687 | // Convert the array. |
---|
| 1688 | $result = explode("|", implode("|", $result)); |
---|
| 1689 | |
---|
| 1690 | // Get the value of the first result. |
---|
| 1691 | $value = $this->get_content($result[0]); |
---|
| 1692 | |
---|
| 1693 | // Return the value. |
---|
| 1694 | return $value; |
---|
| 1695 | } |
---|
| 1696 | |
---|
| 1697 | // Return the predicate as a string. |
---|
| 1698 | return $predicate; |
---|
| 1699 | } |
---|
| 1700 | |
---|
| 1701 | /** |
---|
| 1702 | * Checks whether a node matches predicates. |
---|
| 1703 | * |
---|
| 1704 | * This method checks whether a list of nodes passed to this method match |
---|
| 1705 | * a given list of predicates. |
---|
| 1706 | * |
---|
| 1707 | * @access private |
---|
| 1708 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1709 | * @param array $nodes Array of full paths of all nodes to be tested. |
---|
| 1710 | * @param array $predicates Array of predicates to use. |
---|
| 1711 | * @return array The array returned by this method contains a list of |
---|
| 1712 | * all nodes matching the given predicates. |
---|
| 1713 | * @see evaluate_step() |
---|
| 1714 | */ |
---|
| 1715 | function check_predicates ( $nodes, $predicates ) |
---|
| 1716 | { |
---|
| 1717 | // Create an empty set of nodes. |
---|
| 1718 | $result = array(); |
---|
| 1719 | |
---|
| 1720 | // Run through all nodes. |
---|
| 1721 | foreach ( $nodes as $node ) |
---|
| 1722 | { |
---|
| 1723 | // Create a variable whether to add this node to the node-set. |
---|
| 1724 | $add = true; |
---|
| 1725 | |
---|
| 1726 | // Run through all predicates. |
---|
| 1727 | foreach ( $predicates as $predicate ) |
---|
| 1728 | { |
---|
| 1729 | // Check whether the predicate is just an number. |
---|
[5912] | 1730 | if ( preg_match('/^[0-9]+$/', $predicate) ) |
---|
[2] | 1731 | { |
---|
| 1732 | // Enhance the predicate. |
---|
| 1733 | $predicate .= "=position()"; |
---|
| 1734 | } |
---|
| 1735 | |
---|
| 1736 | // Do the predicate check. |
---|
| 1737 | $check = $this->evaluate_predicate($node, $predicate); |
---|
| 1738 | |
---|
| 1739 | // Check whether it's a string. |
---|
| 1740 | if ( is_string($check) && ( ( $check == "" ) || |
---|
| 1741 | ( $check == $predicate ) ) ) |
---|
| 1742 | { |
---|
| 1743 | // Set the result to false. |
---|
| 1744 | $check = false; |
---|
| 1745 | } |
---|
| 1746 | |
---|
| 1747 | // Check whether it's an integer. |
---|
| 1748 | if ( is_int($check) ) |
---|
| 1749 | { |
---|
| 1750 | // Check whether it's the current position. |
---|
| 1751 | if ( $check == $this->handle_function_position($node, "") ) |
---|
| 1752 | { |
---|
| 1753 | // Set it to true. |
---|
| 1754 | $check = true; |
---|
| 1755 | } |
---|
| 1756 | else |
---|
| 1757 | { |
---|
| 1758 | // Set it to false. |
---|
| 1759 | $check = false; |
---|
| 1760 | } |
---|
| 1761 | } |
---|
| 1762 | |
---|
| 1763 | // Check whether the predicate is OK for this node. |
---|
| 1764 | $add = $add && $check; |
---|
| 1765 | } |
---|
| 1766 | |
---|
| 1767 | // Check whether to add this node to the node-set. |
---|
| 1768 | if ( $add ) |
---|
| 1769 | { |
---|
| 1770 | // Add the node to the node-set. |
---|
| 1771 | $result[] = $node; |
---|
| 1772 | } |
---|
| 1773 | } |
---|
| 1774 | |
---|
| 1775 | // Return the array of nodes. |
---|
| 1776 | return $result; |
---|
| 1777 | } |
---|
| 1778 | |
---|
| 1779 | /** |
---|
| 1780 | * Checks whether a node matches a node-test. |
---|
| 1781 | * |
---|
| 1782 | * This method checks whether a node in the document matches a given |
---|
| 1783 | * node-test. |
---|
| 1784 | * |
---|
| 1785 | * @access private |
---|
| 1786 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1787 | * @param string $context Full path of the node, which should be tested |
---|
| 1788 | * for matching the node-test. |
---|
| 1789 | * @param string $node_test String containing the node-test for the |
---|
| 1790 | * node. |
---|
| 1791 | * @return boolean This method returns true if the node matches the |
---|
| 1792 | * node-test, otherwise false. |
---|
| 1793 | * @see evaluate() |
---|
| 1794 | */ |
---|
| 1795 | function check_node_test ( $context, $node_test ) |
---|
| 1796 | { |
---|
| 1797 | // Check whether it's a function. |
---|
[5912] | 1798 | if ( preg_match('/\(/', $node_test) ) |
---|
[2] | 1799 | { |
---|
| 1800 | // Get the type of function to use. |
---|
| 1801 | $function = $this->prestr($node_test, "("); |
---|
| 1802 | |
---|
| 1803 | // Check whether the node fits the method. |
---|
| 1804 | switch ( $function ) |
---|
| 1805 | { |
---|
| 1806 | case "node": |
---|
| 1807 | // Add this node to the list of nodes. |
---|
| 1808 | return true; |
---|
| 1809 | |
---|
| 1810 | case "text": |
---|
| 1811 | // Check whether the node has some text. |
---|
| 1812 | if ( !empty($this->nodes[$context]["text"]) ) |
---|
| 1813 | { |
---|
| 1814 | // Add this node to the list of nodes. |
---|
| 1815 | return true; |
---|
| 1816 | } |
---|
| 1817 | break; |
---|
| 1818 | |
---|
| 1819 | case "comment": |
---|
| 1820 | // Check whether the node has some comment. |
---|
| 1821 | if ( !empty($this->nodes[$context]["comment"]) ) |
---|
| 1822 | { |
---|
| 1823 | // Add this node to the list of nodes. |
---|
| 1824 | return true; |
---|
| 1825 | } |
---|
| 1826 | break; |
---|
| 1827 | |
---|
| 1828 | case "processing-instruction": |
---|
| 1829 | // Get the literal argument. |
---|
| 1830 | $literal = $this->afterstr($axis["node-test"], "("); |
---|
| 1831 | |
---|
| 1832 | // Cut the literal. |
---|
| 1833 | $literal = substr($literal, 0, strlen($literal) - 1); |
---|
| 1834 | |
---|
| 1835 | // Check whether a literal was given. |
---|
| 1836 | if ( !empty($literal) ) |
---|
| 1837 | { |
---|
| 1838 | // Check whether the node's processing instructions |
---|
| 1839 | // are matching the literals given. |
---|
| 1840 | if ( $this->nodes[$context] |
---|
| 1841 | ["processing-instructions"] == $literal ) |
---|
| 1842 | { |
---|
| 1843 | // Add this node to the node-set. |
---|
| 1844 | return true; |
---|
| 1845 | } |
---|
| 1846 | } |
---|
| 1847 | else |
---|
| 1848 | { |
---|
| 1849 | // Check whether the node has processing |
---|
| 1850 | // instructions. |
---|
| 1851 | if ( !empty($this->nodes[$context] |
---|
| 1852 | ["processing-instructions"]) ) |
---|
| 1853 | { |
---|
| 1854 | // Add this node to the node-set. |
---|
| 1855 | return true; |
---|
| 1856 | } |
---|
| 1857 | } |
---|
| 1858 | break; |
---|
| 1859 | |
---|
| 1860 | default: |
---|
| 1861 | // Display an error message. |
---|
| 1862 | $this->display_error("While parsing an XPath ". |
---|
| 1863 | "expression there was found an undefined ". |
---|
| 1864 | "function called \"%s\".", |
---|
| 1865 | str_replace($function, "<b>".$function."</b>", |
---|
| 1866 | $this->xpath)); |
---|
| 1867 | } |
---|
| 1868 | } |
---|
| 1869 | elseif ( $node_test == "*" ) |
---|
| 1870 | { |
---|
| 1871 | // Add this node to the node-set. |
---|
| 1872 | return true; |
---|
| 1873 | } |
---|
[5912] | 1874 | elseif ( preg_match('/^[a-zA-Z0-9\-_]+/', $node_test) ) |
---|
[2] | 1875 | { |
---|
| 1876 | // Check whether the node-test can be fulfilled. |
---|
| 1877 | if ( $this->nodes[$context]["name"] == $node_test ) |
---|
| 1878 | { |
---|
| 1879 | // Add this node to the node-set. |
---|
| 1880 | return true; |
---|
| 1881 | } |
---|
| 1882 | } |
---|
| 1883 | else |
---|
| 1884 | { |
---|
| 1885 | // Display an error message. |
---|
| 1886 | $this->display_error("While parsing the XPath expression \"%s\" ". |
---|
| 1887 | "an empty and therefore invalid node-test has been found.", |
---|
| 1888 | $this->xpath); |
---|
| 1889 | } |
---|
| 1890 | |
---|
| 1891 | // Don't add this context. |
---|
| 1892 | return false; |
---|
| 1893 | } |
---|
| 1894 | |
---|
| 1895 | /** |
---|
| 1896 | * Handles the XPath child axis. |
---|
| 1897 | * |
---|
| 1898 | * This method handles the XPath child axis. |
---|
| 1899 | * |
---|
| 1900 | * @access private |
---|
| 1901 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1902 | * @param array $axis Array containing information about the axis. |
---|
| 1903 | * @param string $context Node from which starting the axis should |
---|
| 1904 | * be processed. |
---|
| 1905 | * @return array This method returns an array containing all nodes |
---|
| 1906 | * that were found during the evaluation of the given axis. |
---|
| 1907 | * @see evaluate() |
---|
| 1908 | */ |
---|
| 1909 | function handle_axis_child ( $axis, $context ) |
---|
| 1910 | { |
---|
| 1911 | // Create an empty node-set. |
---|
| 1912 | $nodes = array(); |
---|
| 1913 | |
---|
| 1914 | // Get a list of all children. |
---|
| 1915 | $children = $this->nodes[$context]["children"]; |
---|
| 1916 | |
---|
| 1917 | // Check whether there are children. |
---|
| 1918 | if ( !empty($children) ) |
---|
| 1919 | { |
---|
| 1920 | // Run through all children. |
---|
| 1921 | foreach ( $children as $child_name => $child_position ) |
---|
| 1922 | { |
---|
| 1923 | // Run through all childs with this name. |
---|
[7655] | 1924 | for ( $i = 1; $i <= $child_position; ++$i ) |
---|
[2] | 1925 | { |
---|
| 1926 | // Create the path of the child. |
---|
| 1927 | $child = $context."/".$child_name."[".$i."]"; |
---|
| 1928 | |
---|
| 1929 | // Check whether |
---|
| 1930 | if ( $this->check_node_test($child, $axis["node-test"]) ) |
---|
| 1931 | { |
---|
| 1932 | // Add the child to the node-set. |
---|
| 1933 | $nodes[] = $child; |
---|
| 1934 | } |
---|
| 1935 | } |
---|
| 1936 | } |
---|
| 1937 | } |
---|
| 1938 | |
---|
| 1939 | // Return the nodeset. |
---|
| 1940 | return $nodes; |
---|
| 1941 | } |
---|
| 1942 | |
---|
| 1943 | /** |
---|
| 1944 | * Handles the XPath parent axis. |
---|
| 1945 | * |
---|
| 1946 | * This method handles the XPath parent axis. |
---|
| 1947 | * |
---|
| 1948 | * @access private |
---|
| 1949 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1950 | * @param array $axis Array containing information about the axis. |
---|
| 1951 | * @param string $context Node from which starting the axis should |
---|
| 1952 | * be processed. |
---|
| 1953 | * @return array This method returns an array containing all nodes |
---|
| 1954 | * that were found during the evaluation of the given axis. |
---|
| 1955 | * @see evaluate() |
---|
| 1956 | */ |
---|
| 1957 | function handle_axis_parent ( $axis, $context ) |
---|
| 1958 | { |
---|
| 1959 | // Create an empty node-set. |
---|
| 1960 | $nodes = array(); |
---|
| 1961 | |
---|
| 1962 | // Check whether the parent matches the node-test. |
---|
| 1963 | if ( $this->check_node_test($this->nodes[$context]["parent"], |
---|
| 1964 | $axis["node-test"]) ) |
---|
| 1965 | { |
---|
| 1966 | // Add this node to the list of nodes. |
---|
| 1967 | $nodes[] = $this->nodes[$context]["parent"]; |
---|
| 1968 | } |
---|
| 1969 | |
---|
| 1970 | // Return the nodeset. |
---|
| 1971 | return $nodes; |
---|
| 1972 | } |
---|
| 1973 | |
---|
| 1974 | /** |
---|
| 1975 | * Handles the XPath attribute axis. |
---|
| 1976 | * |
---|
| 1977 | * This method handles the XPath attribute axis. |
---|
| 1978 | * |
---|
| 1979 | * @access private |
---|
| 1980 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 1981 | * @param array $axis Array containing information about the axis. |
---|
| 1982 | * @param string $context Node from which starting the axis should |
---|
| 1983 | * be processed. |
---|
| 1984 | * @return array This method returns an array containing all nodes |
---|
| 1985 | * that were found during the evaluation of the given axis. |
---|
| 1986 | * @see evaluate() |
---|
| 1987 | */ |
---|
| 1988 | function handle_axis_attribute ( $axis, $context ) |
---|
| 1989 | { |
---|
| 1990 | // Create an empty node-set. |
---|
| 1991 | $nodes = array(); |
---|
| 1992 | |
---|
| 1993 | // Check whether all nodes should be selected. |
---|
| 1994 | if ( $axis["node-test"] == "*" ) |
---|
| 1995 | { |
---|
| 1996 | // Check whether there are attributes. |
---|
| 1997 | if ( count($this->nodes[$context]["attributes"]) > 0 ) |
---|
| 1998 | { |
---|
| 1999 | // Run through the attributes. |
---|
| 2000 | foreach ( $this->nodes[$context]["attributes"] as |
---|
| 2001 | $key => $value ) |
---|
| 2002 | { |
---|
| 2003 | // Add this node to the node-set. |
---|
| 2004 | $nodes[] = $context."/attribute::".$key; |
---|
| 2005 | } |
---|
| 2006 | } |
---|
| 2007 | } |
---|
| 2008 | elseif ( !empty($this->nodes[$context]["attributes"] |
---|
| 2009 | [$axis["node-test"]]) ) |
---|
| 2010 | { |
---|
| 2011 | // Add this node to the node-set. |
---|
| 2012 | $nodes[] = $context."/attribute::".$axis["node-test"]; |
---|
| 2013 | } |
---|
| 2014 | |
---|
| 2015 | // Return the nodeset. |
---|
| 2016 | return $nodes; |
---|
| 2017 | } |
---|
| 2018 | |
---|
| 2019 | /** |
---|
| 2020 | * Handles the XPath self axis. |
---|
| 2021 | * |
---|
| 2022 | * This method handles the XPath self axis. |
---|
| 2023 | * |
---|
| 2024 | * @access private |
---|
| 2025 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2026 | * @param array $axis Array containing information about the axis. |
---|
| 2027 | * @param string $context Node from which starting the axis should |
---|
| 2028 | * be processed. |
---|
| 2029 | * @return array This method returns an array containing all nodes |
---|
| 2030 | * that were found during the evaluation of the given axis. |
---|
| 2031 | * @see evaluate() |
---|
| 2032 | */ |
---|
| 2033 | function handle_axis_self ( $axis, $context ) |
---|
| 2034 | { |
---|
| 2035 | // Create an empty node-set. |
---|
| 2036 | $nodes = array(); |
---|
| 2037 | |
---|
| 2038 | // Check whether the context match the node-test. |
---|
| 2039 | if ( $this->check_node_test($context, $axis["node-test"]) ) |
---|
| 2040 | { |
---|
| 2041 | // Add this node to the node-set. |
---|
| 2042 | $nodes[] = $context; |
---|
| 2043 | } |
---|
| 2044 | |
---|
| 2045 | // Return the nodeset. |
---|
| 2046 | return $nodes; |
---|
| 2047 | } |
---|
| 2048 | |
---|
| 2049 | /** |
---|
| 2050 | * Handles the XPath descendant axis. |
---|
| 2051 | * |
---|
| 2052 | * This method handles the XPath descendant axis. |
---|
| 2053 | * |
---|
| 2054 | * @access private |
---|
| 2055 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2056 | * @param array $axis Array containing information about the axis. |
---|
| 2057 | * @param string $context Node from which starting the axis should |
---|
| 2058 | * be processed. |
---|
| 2059 | * @return array This method returns an array containing all nodes |
---|
| 2060 | * that were found during the evaluation of the given axis. |
---|
| 2061 | * @see evaluate() |
---|
| 2062 | */ |
---|
| 2063 | function handle_axis_descendant ( $axis, $context ) |
---|
| 2064 | { |
---|
| 2065 | // Create an empty node-set. |
---|
| 2066 | $nodes = array(); |
---|
| 2067 | |
---|
| 2068 | // Check whether the current node has children. |
---|
| 2069 | if ( count($this->nodes[$context]["children"]) > 0 ) |
---|
| 2070 | { |
---|
| 2071 | // Get a list of children. |
---|
| 2072 | $children = $this->nodes[$context]["children"]; |
---|
| 2073 | |
---|
| 2074 | // Run through all children. |
---|
| 2075 | foreach ( $children as $child_name => $child_position ) |
---|
| 2076 | { |
---|
| 2077 | // Run through all children of this name. |
---|
[7655] | 2078 | for ( $i = 1; $i <= $child_position; ++$i ) |
---|
[2] | 2079 | { |
---|
| 2080 | // Create the full path for the children. |
---|
| 2081 | $child = $context."/".$child_name."[".$i."]"; |
---|
| 2082 | |
---|
| 2083 | // Check whether the child matches the node-test. |
---|
| 2084 | if ( $this->check_node_test($child, $axis["node-test"]) ) |
---|
| 2085 | { |
---|
| 2086 | // Add the child to the list of nodes. |
---|
| 2087 | $nodes[] = $child; |
---|
| 2088 | } |
---|
| 2089 | |
---|
| 2090 | // Recurse to the next level. |
---|
| 2091 | $nodes = array_merge($nodes, |
---|
| 2092 | $this->handle_axis_descendant($axis, $child)); |
---|
| 2093 | } |
---|
| 2094 | } |
---|
| 2095 | } |
---|
| 2096 | |
---|
| 2097 | // Return the nodeset. |
---|
| 2098 | return $nodes; |
---|
| 2099 | } |
---|
| 2100 | |
---|
| 2101 | /** |
---|
| 2102 | * Handles the XPath ancestor axis. |
---|
| 2103 | * |
---|
| 2104 | * This method handles the XPath ancestor axis. |
---|
| 2105 | * |
---|
| 2106 | * @access private |
---|
| 2107 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2108 | * @param array $axis Array containing information about the axis. |
---|
| 2109 | * @param string $context Node from which starting the axis should |
---|
| 2110 | * be processed. |
---|
| 2111 | * @return array This method returns an array containing all nodes |
---|
| 2112 | * that were found during the evaluation of the given axis. |
---|
| 2113 | * @see evaluate() |
---|
| 2114 | */ |
---|
| 2115 | function handle_axis_ancestor ( $axis, $context ) |
---|
| 2116 | { |
---|
| 2117 | // Create an empty node-set. |
---|
| 2118 | $nodes = array(); |
---|
| 2119 | |
---|
| 2120 | // Get the parent of the current node. |
---|
| 2121 | $parent = $this->nodes[$context]["parent"]; |
---|
| 2122 | |
---|
| 2123 | // Check whether the parent isn't empty. |
---|
| 2124 | if ( !empty($parent) ) |
---|
| 2125 | { |
---|
| 2126 | // Check whether the parent matches the node-test. |
---|
| 2127 | if ( $this->check_node_test($parent, $axis["node-test"]) ) |
---|
| 2128 | { |
---|
| 2129 | // Add the parent to the list of nodes. |
---|
| 2130 | $nodes[] = $parent; |
---|
| 2131 | } |
---|
| 2132 | |
---|
| 2133 | // Handle all other ancestors. |
---|
| 2134 | $nodes = array_merge($nodes, |
---|
| 2135 | $this->handle_axis_ancestor($axis, $parent)); |
---|
| 2136 | } |
---|
| 2137 | |
---|
| 2138 | // Return the nodeset. |
---|
| 2139 | return $nodes; |
---|
| 2140 | } |
---|
| 2141 | |
---|
| 2142 | /** |
---|
| 2143 | * Handles the XPath namespace axis. |
---|
| 2144 | * |
---|
| 2145 | * This method handles the XPath namespace axis. |
---|
| 2146 | * |
---|
| 2147 | * @access private |
---|
| 2148 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2149 | * @param array $axis Array containing information about the axis. |
---|
| 2150 | * @param string $context Node from which starting the axis should |
---|
| 2151 | * be processed. |
---|
| 2152 | * @return array This method returns an array containing all nodes |
---|
| 2153 | * that were found during the evaluation of the given axis. |
---|
| 2154 | * @see evaluate() |
---|
| 2155 | */ |
---|
| 2156 | function handle_axis_namespace ( $axis, $context ) |
---|
| 2157 | { |
---|
| 2158 | // Create an empty node-set. |
---|
| 2159 | $nodes = array(); |
---|
| 2160 | |
---|
| 2161 | // Check whether all nodes should be selected. |
---|
| 2162 | if ( !empty($this->nodes[$context]["namespace"]) ) |
---|
| 2163 | { |
---|
| 2164 | // Add this node to the node-set. |
---|
| 2165 | $nodes[] = $context; |
---|
| 2166 | } |
---|
| 2167 | |
---|
| 2168 | // Return the nodeset. |
---|
| 2169 | return $nodes; |
---|
| 2170 | } |
---|
| 2171 | |
---|
| 2172 | /** |
---|
| 2173 | * Handles the XPath following axis. |
---|
| 2174 | * |
---|
| 2175 | * This method handles the XPath following axis. |
---|
| 2176 | * |
---|
| 2177 | * @access private |
---|
| 2178 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2179 | * @param array $axis Array containing information about the axis. |
---|
| 2180 | * @param string $context Node from which starting the axis should |
---|
| 2181 | * be processed. |
---|
| 2182 | * @return array This method returns an array containing all nodes |
---|
| 2183 | * that were found during the evaluation of the given axis. |
---|
| 2184 | * @see evaluate() |
---|
| 2185 | */ |
---|
| 2186 | function handle_axis_following ( $axis, $context ) |
---|
| 2187 | { |
---|
| 2188 | // Create an empty node-set. |
---|
| 2189 | $nodes = array(); |
---|
| 2190 | |
---|
| 2191 | // Get the current document position. |
---|
| 2192 | $position = $this->nodes[$context]["document-position"]; |
---|
| 2193 | |
---|
| 2194 | // Create a flag, whether we already found the context node. |
---|
| 2195 | $found = false; |
---|
| 2196 | |
---|
| 2197 | // Run through all nodes of the document. |
---|
| 2198 | foreach ( $this->nodes as $node => $data ) |
---|
| 2199 | { |
---|
| 2200 | // Check whether the context node has already been found. |
---|
| 2201 | if ( $found ) |
---|
| 2202 | { |
---|
| 2203 | // Check whether the position is correct. |
---|
| 2204 | if ( $this->nodes[$node]["document-position"] == $position ) |
---|
| 2205 | { |
---|
| 2206 | // Check whether the node fits the node-test. |
---|
| 2207 | if ( $this->check_node_test($node, $axis["node-test"]) ) |
---|
| 2208 | { |
---|
| 2209 | // Add the node to the list of nodes. |
---|
| 2210 | $nodes[] = $node; |
---|
| 2211 | } |
---|
| 2212 | } |
---|
| 2213 | } |
---|
| 2214 | |
---|
| 2215 | // Check whether this is the context node. |
---|
| 2216 | if ( $node == $context ) |
---|
| 2217 | { |
---|
| 2218 | // After this we'll look for more nodes. |
---|
| 2219 | $found = true; |
---|
| 2220 | } |
---|
| 2221 | } |
---|
| 2222 | |
---|
| 2223 | // Return the nodeset. |
---|
| 2224 | return $nodes; |
---|
| 2225 | } |
---|
| 2226 | |
---|
| 2227 | /** |
---|
| 2228 | * Handles the XPath preceding axis. |
---|
| 2229 | * |
---|
| 2230 | * This method handles the XPath preceding axis. |
---|
| 2231 | * |
---|
| 2232 | * @access private |
---|
| 2233 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2234 | * @param array $axis Array containing information about the axis. |
---|
| 2235 | * @param string $context Node from which starting the axis should |
---|
| 2236 | * be processed. |
---|
| 2237 | * @return array This method returns an array containing all nodes |
---|
| 2238 | * that were found during the evaluation of the given axis. |
---|
| 2239 | * @see evaluate() |
---|
| 2240 | */ |
---|
| 2241 | function handle_axis_preceding ( $axis, $context ) |
---|
| 2242 | { |
---|
| 2243 | // Create an empty node-set. |
---|
| 2244 | $nodes = array(); |
---|
| 2245 | |
---|
| 2246 | // Get the current document position. |
---|
| 2247 | $position = $this->nodes[$context]["document-position"]; |
---|
| 2248 | |
---|
| 2249 | // Create a flag, whether we already found the context node. |
---|
| 2250 | $found = true; |
---|
| 2251 | |
---|
| 2252 | // Run through all nodes of the document. |
---|
| 2253 | foreach ( $this->nodes as $node => $data ) |
---|
| 2254 | { |
---|
| 2255 | // Check whether this is the context node. |
---|
| 2256 | if ( $node == $context ) |
---|
| 2257 | { |
---|
| 2258 | // After this we won't look for more nodes. |
---|
| 2259 | $found = false; |
---|
| 2260 | } |
---|
| 2261 | |
---|
| 2262 | // Check whether the context node has already been found. |
---|
| 2263 | if ( $found ) |
---|
| 2264 | { |
---|
| 2265 | // Check whether the position is correct. |
---|
| 2266 | if ( $this->nodes[$node]["document-position"] == $position ) |
---|
| 2267 | { |
---|
| 2268 | // Check whether the node fits the node-test. |
---|
| 2269 | if ( $this->check_node_test($node, $axis["node-test"]) ) |
---|
| 2270 | { |
---|
| 2271 | // Add the node to the list of nodes. |
---|
| 2272 | $nodes[] = $node; |
---|
| 2273 | } |
---|
| 2274 | } |
---|
| 2275 | } |
---|
| 2276 | } |
---|
| 2277 | |
---|
| 2278 | // Return the nodeset. |
---|
| 2279 | return $nodes; |
---|
| 2280 | } |
---|
| 2281 | |
---|
| 2282 | /** |
---|
| 2283 | * Handles the XPath following-sibling axis. |
---|
| 2284 | * |
---|
| 2285 | * This method handles the XPath following-sibling axis. |
---|
| 2286 | * |
---|
| 2287 | * @access private |
---|
| 2288 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2289 | * @param array $axis Array containing information about the axis. |
---|
| 2290 | * @param string $context Node from which starting the axis should |
---|
| 2291 | * be processed. |
---|
| 2292 | * @return array This method returns an array containing all nodes |
---|
| 2293 | * that were found during the evaluation of the given axis. |
---|
| 2294 | * @see evaluate() |
---|
| 2295 | */ |
---|
| 2296 | function handle_axis_following_sibling ( $axis, $context ) |
---|
| 2297 | { |
---|
| 2298 | // Create an empty node-set. |
---|
| 2299 | $nodes = array(); |
---|
| 2300 | |
---|
| 2301 | // Get all children from the parent. |
---|
| 2302 | $siblings = $this->handle_axis_child($axis, |
---|
| 2303 | $this->nodes[$context]["parent"]); |
---|
| 2304 | |
---|
| 2305 | // Create a flag whether the context node was already found. |
---|
| 2306 | $found = false; |
---|
| 2307 | |
---|
| 2308 | // Run through all siblings. |
---|
| 2309 | foreach ( $siblings as $sibling ) |
---|
| 2310 | { |
---|
| 2311 | // Check whether the context node was already found. |
---|
| 2312 | if ( $found ) |
---|
| 2313 | { |
---|
| 2314 | // Check whether the sibling is a real sibling. |
---|
| 2315 | if ( $this->nodes[$sibling]["name"] == |
---|
| 2316 | $this->nodes[$context]["name"] ) |
---|
| 2317 | { |
---|
| 2318 | // Check whether the sibling matches the node-test. |
---|
| 2319 | if ( $this->check_node_test($sibling, $axis["node-test"]) ) |
---|
| 2320 | { |
---|
| 2321 | // Add the sibling to the list of nodes. |
---|
| 2322 | $nodes[] = $sibling; |
---|
| 2323 | } |
---|
| 2324 | } |
---|
| 2325 | } |
---|
| 2326 | |
---|
| 2327 | // Check whether this is the context node. |
---|
| 2328 | if ( $sibling == $context ) |
---|
| 2329 | { |
---|
| 2330 | // Continue looking for other siblings. |
---|
| 2331 | $found = true; |
---|
| 2332 | } |
---|
| 2333 | } |
---|
| 2334 | |
---|
| 2335 | // Return the nodeset. |
---|
| 2336 | return $nodes; |
---|
| 2337 | } |
---|
| 2338 | |
---|
| 2339 | /** |
---|
| 2340 | * Handles the XPath preceding-sibling axis. |
---|
| 2341 | * |
---|
| 2342 | * This method handles the XPath preceding-sibling axis. |
---|
| 2343 | * |
---|
| 2344 | * @access private |
---|
| 2345 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2346 | * @param array $axis Array containing information about the axis. |
---|
| 2347 | * @param string $context Node from which starting the axis should |
---|
| 2348 | * be processed. |
---|
| 2349 | * @return array This method returns an array containing all nodes |
---|
| 2350 | * that were found during the evaluation of the given axis. |
---|
| 2351 | * @see evaluate() |
---|
| 2352 | */ |
---|
| 2353 | function handle_axis_preceding_sibling ( $axis, $context ) |
---|
| 2354 | { |
---|
| 2355 | // Create an empty node-set. |
---|
| 2356 | $nodes = array(); |
---|
| 2357 | |
---|
| 2358 | // Get all children from the parent. |
---|
| 2359 | $siblings = $this->handle_axis_child($axis, |
---|
| 2360 | $this->nodes[$context]["parent"]); |
---|
| 2361 | |
---|
| 2362 | // Create a flag whether the context node was already found. |
---|
| 2363 | $found = true; |
---|
| 2364 | |
---|
| 2365 | // Run through all siblings. |
---|
| 2366 | foreach ( $siblings as $sibling ) |
---|
| 2367 | { |
---|
| 2368 | // Check whether this is the context node. |
---|
| 2369 | if ( $sibling == $context ) |
---|
| 2370 | { |
---|
| 2371 | // Don't continue looking for other siblings. |
---|
| 2372 | $found = false; |
---|
| 2373 | } |
---|
| 2374 | |
---|
| 2375 | // Check whether the context node was already found. |
---|
| 2376 | if ( $found ) |
---|
| 2377 | { |
---|
| 2378 | // Check whether the sibling is a real sibling. |
---|
| 2379 | if ( $this->nodes[$sibling]["name"] == |
---|
| 2380 | $this->nodes[$context]["name"] ) |
---|
| 2381 | { |
---|
| 2382 | // Check whether the sibling matches the node-test. |
---|
| 2383 | if ( $this->check_node_test($sibling, $axis["node-test"]) ) |
---|
| 2384 | { |
---|
| 2385 | // Add the sibling to the list of nodes. |
---|
| 2386 | $nodes[] = $sibling; |
---|
| 2387 | } |
---|
| 2388 | } |
---|
| 2389 | } |
---|
| 2390 | } |
---|
| 2391 | |
---|
| 2392 | // Return the nodeset. |
---|
| 2393 | return $nodes; |
---|
| 2394 | } |
---|
| 2395 | |
---|
| 2396 | /** |
---|
| 2397 | * Handles the XPath descendant-or-self axis. |
---|
| 2398 | * |
---|
| 2399 | * This method handles the XPath descendant-or-self axis. |
---|
| 2400 | * |
---|
| 2401 | * @access private |
---|
| 2402 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2403 | * @param array $axis Array containing information about the axis. |
---|
| 2404 | * @param string $context Node from which starting the axis should |
---|
| 2405 | * be processed. |
---|
| 2406 | * @return array This method returns an array containing all nodes |
---|
| 2407 | * that were found during the evaluation of the given axis. |
---|
| 2408 | * @see evaluate() |
---|
| 2409 | */ |
---|
| 2410 | function handle_axis_descendant_or_self ( $axis, $context ) |
---|
| 2411 | { |
---|
| 2412 | // Create an empty node-set. |
---|
| 2413 | $nodes = array(); |
---|
| 2414 | |
---|
| 2415 | // Read the nodes. |
---|
| 2416 | $nodes = array_merge( |
---|
| 2417 | $this->handle_axis_descendant($axis, $context), |
---|
| 2418 | $this->handle_axis_self($axis, $context)); |
---|
| 2419 | |
---|
| 2420 | // Return the nodeset. |
---|
| 2421 | return $nodes; |
---|
| 2422 | } |
---|
| 2423 | |
---|
| 2424 | /** |
---|
| 2425 | * Handles the XPath ancestor-or-self axis. |
---|
| 2426 | * |
---|
| 2427 | * This method handles the XPath ancestor-or-self axis. |
---|
| 2428 | * |
---|
| 2429 | * @access private |
---|
| 2430 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2431 | * @param array $axis Array containing information about the axis. |
---|
| 2432 | * @param string $context Node from which starting the axis should |
---|
| 2433 | * be processed. |
---|
| 2434 | * @return array This method returns an array containing all nodes |
---|
| 2435 | * that were found during the evaluation of the given axis. |
---|
| 2436 | * @see evaluate() |
---|
| 2437 | */ |
---|
| 2438 | function handle_axis_ancestor_or_self ( $axis, $context ) |
---|
| 2439 | { |
---|
| 2440 | // Create an empty node-set. |
---|
| 2441 | $nodes = array(); |
---|
| 2442 | |
---|
| 2443 | // Read the nodes. |
---|
| 2444 | $nodes = array_merge( |
---|
| 2445 | $this->handle_axis_ancestor($axis, $context), |
---|
| 2446 | $this->handle_axis_self($axis, $context)); |
---|
| 2447 | |
---|
| 2448 | // Return the nodeset. |
---|
| 2449 | return $nodes; |
---|
| 2450 | } |
---|
| 2451 | |
---|
| 2452 | /** |
---|
| 2453 | * Handles the XPath function last. |
---|
| 2454 | * |
---|
| 2455 | * This method handles the XPath function last. |
---|
| 2456 | * |
---|
| 2457 | * @access private |
---|
| 2458 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2459 | * @param string $node Full path of the node on which the function |
---|
| 2460 | * should be processed. |
---|
| 2461 | * @param string $arguments String containing the arguments that were |
---|
| 2462 | * passed to the function. |
---|
| 2463 | * @return mixed Depending on the type of function being processed this |
---|
| 2464 | * method returns different types. |
---|
| 2465 | * @see evaluate() |
---|
| 2466 | */ |
---|
| 2467 | function handle_function_last ( $node, $arguments ) |
---|
| 2468 | { |
---|
| 2469 | // Calculate the size of the context. |
---|
| 2470 | $parent = $this->nodes[$node]["parent"]; |
---|
| 2471 | $children = $this->nodes[$parent]["children"]; |
---|
| 2472 | $context = $children[$this->nodes[$node]["name"]]; |
---|
| 2473 | |
---|
| 2474 | // Return the size. |
---|
| 2475 | return $context; |
---|
| 2476 | } |
---|
| 2477 | |
---|
| 2478 | /** |
---|
| 2479 | * Handles the XPath function position. |
---|
| 2480 | * |
---|
| 2481 | * This method handles the XPath function position. |
---|
| 2482 | * |
---|
| 2483 | * @access private |
---|
| 2484 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2485 | * @param string $node Full path of the node on which the function |
---|
| 2486 | * should be processed. |
---|
| 2487 | * @param string $arguments String containing the arguments that were |
---|
| 2488 | * passed to the function. |
---|
| 2489 | * @return mixed Depending on the type of function being processed this |
---|
| 2490 | * method returns different types. |
---|
| 2491 | * @see evaluate() |
---|
| 2492 | */ |
---|
| 2493 | function handle_function_position ( $node, $arguments ) |
---|
| 2494 | { |
---|
| 2495 | // return the context-position. |
---|
| 2496 | return $this->nodes[$node]["context-position"]; |
---|
| 2497 | } |
---|
| 2498 | |
---|
| 2499 | /** |
---|
| 2500 | * Handles the XPath function count. |
---|
| 2501 | * |
---|
| 2502 | * This method handles the XPath function count. |
---|
| 2503 | * |
---|
| 2504 | * @access private |
---|
| 2505 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2506 | * @param string $node Full path of the node on which the function |
---|
| 2507 | * should be processed. |
---|
| 2508 | * @param string $arguments String containing the arguments that were |
---|
| 2509 | * passed to the function. |
---|
| 2510 | * @return mixed Depending on the type of function being processed this |
---|
| 2511 | * method returns different types. |
---|
| 2512 | * @see evaluate() |
---|
| 2513 | */ |
---|
| 2514 | function handle_function_count ( $node, $arguments ) |
---|
| 2515 | { |
---|
| 2516 | // Evaluate the argument of the method as an XPath and return |
---|
| 2517 | // the number of results. |
---|
| 2518 | return count($this->evaluate($arguments, $node)); |
---|
| 2519 | } |
---|
| 2520 | |
---|
| 2521 | /** |
---|
| 2522 | * Handles the XPath function id. |
---|
| 2523 | * |
---|
| 2524 | * This method handles the XPath function id. |
---|
| 2525 | * |
---|
| 2526 | * @access private |
---|
| 2527 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2528 | * @param string $node Full path of the node on which the function |
---|
| 2529 | * should be processed. |
---|
| 2530 | * @param string $arguments String containing the arguments that were |
---|
| 2531 | * passed to the function. |
---|
| 2532 | * @return mixed Depending on the type of function being processed this |
---|
| 2533 | * method returns different types. |
---|
| 2534 | * @see evaluate() |
---|
| 2535 | */ |
---|
| 2536 | function handle_function_id ( $node, $arguments ) |
---|
| 2537 | { |
---|
| 2538 | // Trim the arguments. |
---|
| 2539 | $arguments = trim($arguments); |
---|
| 2540 | |
---|
| 2541 | // Now split the arguments. |
---|
| 2542 | $arguments = explode(" ", $arguments); |
---|
| 2543 | |
---|
| 2544 | // Check whether |
---|
| 2545 | |
---|
| 2546 | // Create a list of nodes. |
---|
| 2547 | $nodes = array(); |
---|
| 2548 | |
---|
| 2549 | // Run through all document node. |
---|
| 2550 | foreach ( $this->nodes as $node => $position ) |
---|
| 2551 | { |
---|
| 2552 | // Check whether the node has the ID we're looking for. |
---|
| 2553 | if ( in_array($this->nodes[$node]["attributes"]["id"], |
---|
| 2554 | $arguments) ) |
---|
| 2555 | { |
---|
| 2556 | // Add this node to the list of nodes. |
---|
| 2557 | $nodes[] = $node; |
---|
| 2558 | } |
---|
| 2559 | } |
---|
| 2560 | |
---|
| 2561 | // Return the list of nodes. |
---|
| 2562 | return $nodes; |
---|
| 2563 | } |
---|
| 2564 | |
---|
| 2565 | /** |
---|
| 2566 | * Handles the XPath function name. |
---|
| 2567 | * |
---|
| 2568 | * This method handles the XPath function name. |
---|
| 2569 | * |
---|
| 2570 | * @access private |
---|
| 2571 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2572 | * @param string $node Full path of the node on which the function |
---|
| 2573 | * should be processed. |
---|
| 2574 | * @param string $arguments String containing the arguments that were |
---|
| 2575 | * passed to the function. |
---|
| 2576 | * @return mixed Depending on the type of function being processed this |
---|
| 2577 | * method returns different types. |
---|
| 2578 | * @see evaluate() |
---|
| 2579 | */ |
---|
| 2580 | function handle_function_name ( $node, $arguments ) |
---|
| 2581 | { |
---|
| 2582 | // Return the name of the node. |
---|
| 2583 | return $this->nodes[$node]["name"]; |
---|
| 2584 | } |
---|
| 2585 | |
---|
| 2586 | /** |
---|
| 2587 | * Handles the XPath function string. |
---|
| 2588 | * |
---|
| 2589 | * This method handles the XPath function string. |
---|
| 2590 | * |
---|
| 2591 | * @access private |
---|
| 2592 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2593 | * @param string $node Full path of the node on which the function |
---|
| 2594 | * should be processed. |
---|
| 2595 | * @param string $arguments String containing the arguments that were |
---|
| 2596 | * passed to the function. |
---|
| 2597 | * @return mixed Depending on the type of function being processed this |
---|
| 2598 | * method returns different types. |
---|
| 2599 | * @see evaluate() |
---|
| 2600 | */ |
---|
| 2601 | function handle_function_string ( $node, $arguments ) |
---|
| 2602 | { |
---|
| 2603 | // Check what type of parameter is given |
---|
[5912] | 2604 | if ( preg_match('/^[0-9]+(\.[0-9]+)?$/', $arguments) || |
---|
| 2605 | preg_match('/^\.[0-9]+$/', $arguments) ) |
---|
[2] | 2606 | { |
---|
| 2607 | // Convert the digits to a number. |
---|
| 2608 | $number = doubleval($arguments); |
---|
| 2609 | |
---|
| 2610 | // Return the number. |
---|
| 2611 | return strval($number); |
---|
| 2612 | } |
---|
| 2613 | elseif ( is_bool($arguments) ) |
---|
| 2614 | { |
---|
| 2615 | // Check whether it's true. |
---|
| 2616 | if ( $arguments == true ) |
---|
| 2617 | { |
---|
| 2618 | // Return true as a string. |
---|
| 2619 | return "true"; |
---|
| 2620 | } |
---|
| 2621 | else |
---|
| 2622 | { |
---|
| 2623 | // Return false as a string. |
---|
| 2624 | return "false"; |
---|
| 2625 | } |
---|
| 2626 | } |
---|
| 2627 | elseif ( !empty($arguments) ) |
---|
| 2628 | { |
---|
| 2629 | // Use the argument as an XPath. |
---|
| 2630 | $result = $this->evaluate($arguments, $node); |
---|
| 2631 | |
---|
| 2632 | // Get the first argument. |
---|
| 2633 | $result = explode("|", implode("|", $result)); |
---|
| 2634 | |
---|
| 2635 | // Return the first result as a string. |
---|
| 2636 | return $result[0]; |
---|
| 2637 | } |
---|
| 2638 | elseif ( empty($arguments) ) |
---|
| 2639 | { |
---|
| 2640 | // Return the current node. |
---|
| 2641 | return $node; |
---|
| 2642 | } |
---|
| 2643 | else |
---|
| 2644 | { |
---|
| 2645 | // Return an empty string. |
---|
| 2646 | return ""; |
---|
| 2647 | } |
---|
| 2648 | } |
---|
| 2649 | |
---|
| 2650 | /** |
---|
| 2651 | * Handles the XPath function concat. |
---|
| 2652 | * |
---|
| 2653 | * This method handles the XPath function concat. |
---|
| 2654 | * |
---|
| 2655 | * @access private |
---|
| 2656 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2657 | * @param string $node Full path of the node on which the function |
---|
| 2658 | * should be processed. |
---|
| 2659 | * @param string $arguments String containing the arguments that were |
---|
| 2660 | * passed to the function. |
---|
| 2661 | * @return mixed Depending on the type of function being processed this |
---|
| 2662 | * method returns different types. |
---|
| 2663 | * @see evaluate() |
---|
| 2664 | */ |
---|
| 2665 | function handle_function_concat ( $node, $arguments ) |
---|
| 2666 | { |
---|
| 2667 | // Split the arguments. |
---|
| 2668 | $arguments = explode(",", $arguments); |
---|
| 2669 | |
---|
| 2670 | // Run through each argument and evaluate it. |
---|
[7655] | 2671 | for ( $i = 0; $i < sizeof($arguments); ++$i ) |
---|
[2] | 2672 | { |
---|
| 2673 | // Trim each argument. |
---|
| 2674 | $arguments[$i] = trim($arguments[$i]); |
---|
| 2675 | |
---|
| 2676 | // Evaluate it. |
---|
| 2677 | $arguments[$i] = $this->evaluate_predicate($node, $arguments[$i]); |
---|
| 2678 | } |
---|
| 2679 | |
---|
| 2680 | // Put the string together. |
---|
| 2681 | $arguments = implode("", $arguments); |
---|
| 2682 | |
---|
| 2683 | // Return the string. |
---|
| 2684 | return $arguments; |
---|
| 2685 | } |
---|
| 2686 | |
---|
| 2687 | /** |
---|
| 2688 | * Handles the XPath function starts-with. |
---|
| 2689 | * |
---|
| 2690 | * This method handles the XPath function starts-with. |
---|
| 2691 | * |
---|
| 2692 | * @access private |
---|
| 2693 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2694 | * @param string $node Full path of the node on which the function |
---|
| 2695 | * should be processed. |
---|
| 2696 | * @param string $arguments String containing the arguments that were |
---|
| 2697 | * passed to the function. |
---|
| 2698 | * @return mixed Depending on the type of function being processed this |
---|
| 2699 | * method returns different types. |
---|
| 2700 | * @see evaluate() |
---|
| 2701 | */ |
---|
| 2702 | function handle_function_starts_with ( $node, $arguments ) |
---|
| 2703 | { |
---|
| 2704 | // Get the arguments. |
---|
| 2705 | $first = trim($this->prestr($arguments, ",")); |
---|
| 2706 | $second = trim($this->afterstr($arguments, ",")); |
---|
| 2707 | |
---|
| 2708 | // Evaluate each argument. |
---|
| 2709 | $first = $this->evaluate_predicate($node, $first); |
---|
| 2710 | $second = $this->evaluate_predicate($node, $second); |
---|
| 2711 | |
---|
| 2712 | // Check whether the first string starts with the second one. |
---|
[5912] | 2713 | if ( preg_match('/^/'.$second, $first) ) |
---|
[2] | 2714 | { |
---|
| 2715 | // Return true. |
---|
| 2716 | return true; |
---|
| 2717 | } |
---|
| 2718 | else |
---|
| 2719 | { |
---|
| 2720 | // Return false. |
---|
| 2721 | return false; |
---|
| 2722 | } |
---|
| 2723 | } |
---|
| 2724 | |
---|
| 2725 | /** |
---|
| 2726 | * Handles the XPath function contains. |
---|
| 2727 | * |
---|
| 2728 | * This method handles the XPath function contains. |
---|
| 2729 | * |
---|
| 2730 | * @access private |
---|
| 2731 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2732 | * @param string $node Full path of the node on which the function |
---|
| 2733 | * should be processed. |
---|
| 2734 | * @param string $arguments String containing the arguments that were |
---|
| 2735 | * passed to the function. |
---|
| 2736 | * @return mixed Depending on the type of function being processed this |
---|
| 2737 | * method returns different types. |
---|
| 2738 | * @see evaluate() |
---|
| 2739 | */ |
---|
| 2740 | function handle_function_contains ( $node, $arguments ) |
---|
| 2741 | { |
---|
| 2742 | // Get the arguments. |
---|
| 2743 | $first = trim($this->prestr($arguments, ",")); |
---|
| 2744 | $second = trim($this->afterstr($arguments, ",")); |
---|
| 2745 | |
---|
| 2746 | // Evaluate each argument. |
---|
| 2747 | $first = $this->evaluate_predicate($node, $first); |
---|
| 2748 | $second = $this->evaluate_predicate($node, $second); |
---|
| 2749 | |
---|
| 2750 | // Check whether the first string starts with the second one. |
---|
[5915] | 2751 | if ( preg_match("/$second/", $first) ) |
---|
[2] | 2752 | { |
---|
| 2753 | // Return true. |
---|
| 2754 | return true; |
---|
| 2755 | } |
---|
| 2756 | else |
---|
| 2757 | { |
---|
| 2758 | // Return false. |
---|
| 2759 | return false; |
---|
| 2760 | } |
---|
| 2761 | } |
---|
| 2762 | |
---|
| 2763 | /** |
---|
| 2764 | * Handles the XPath function substring-before. |
---|
| 2765 | * |
---|
| 2766 | * This method handles the XPath function substring-before. |
---|
| 2767 | * |
---|
| 2768 | * @access private |
---|
| 2769 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2770 | * @param string $node Full path of the node on which the function |
---|
| 2771 | * should be processed. |
---|
| 2772 | * @param string $arguments String containing the arguments that were |
---|
| 2773 | * passed to the function. |
---|
| 2774 | * @return mixed Depending on the type of function being processed this |
---|
| 2775 | * method returns different types. |
---|
| 2776 | * @see evaluate() |
---|
| 2777 | */ |
---|
| 2778 | function handle_function_substring_before ( $node, $arguments ) |
---|
| 2779 | { |
---|
| 2780 | // Get the arguments. |
---|
| 2781 | $first = trim($this->prestr($arguments, ",")); |
---|
| 2782 | $second = trim($this->afterstr($arguments, ",")); |
---|
| 2783 | |
---|
| 2784 | // Evaluate each argument. |
---|
| 2785 | $first = $this->evaluate_predicate($node, $first); |
---|
| 2786 | $second = $this->evaluate_predicate($node, $second); |
---|
| 2787 | |
---|
| 2788 | // Return the substring. |
---|
| 2789 | return $this->prestr(strval($first), strval($second)); |
---|
| 2790 | } |
---|
| 2791 | |
---|
| 2792 | /** |
---|
| 2793 | * Handles the XPath function substring-after. |
---|
| 2794 | * |
---|
| 2795 | * This method handles the XPath function substring-after. |
---|
| 2796 | * |
---|
| 2797 | * @access private |
---|
| 2798 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2799 | * @param string $node Full path of the node on which the function |
---|
| 2800 | * should be processed. |
---|
| 2801 | * @param string $arguments String containing the arguments that were |
---|
| 2802 | * passed to the function. |
---|
| 2803 | * @return mixed Depending on the type of function being processed this |
---|
| 2804 | * method returns different types. |
---|
| 2805 | * @see evaluate() |
---|
| 2806 | */ |
---|
| 2807 | function handle_function_substring_after ( $node, $arguments ) |
---|
| 2808 | { |
---|
| 2809 | // Get the arguments. |
---|
| 2810 | $first = trim($this->prestr($arguments, ",")); |
---|
| 2811 | $second = trim($this->afterstr($arguments, ",")); |
---|
| 2812 | |
---|
| 2813 | // Evaluate each argument. |
---|
| 2814 | $first = $this->evaluate_predicate($node, $first); |
---|
| 2815 | $second = $this->evaluate_predicate($node, $second); |
---|
| 2816 | |
---|
| 2817 | // Return the substring. |
---|
| 2818 | return $this->afterstr(strval($first), strval($second)); |
---|
| 2819 | } |
---|
| 2820 | |
---|
| 2821 | /** |
---|
| 2822 | * Handles the XPath function substring. |
---|
| 2823 | * |
---|
| 2824 | * This method handles the XPath function substring. |
---|
| 2825 | * |
---|
| 2826 | * @access private |
---|
| 2827 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2828 | * @param string $node Full path of the node on which the function |
---|
| 2829 | * should be processed. |
---|
| 2830 | * @param string $arguments String containing the arguments that were |
---|
| 2831 | * passed to the function. |
---|
| 2832 | * @return mixed Depending on the type of function being processed this |
---|
| 2833 | * method returns different types. |
---|
| 2834 | * @see evaluate() |
---|
| 2835 | */ |
---|
| 2836 | function handle_function_substring ( $node, $arguments ) |
---|
| 2837 | { |
---|
| 2838 | // Split the arguments. |
---|
| 2839 | $arguments = explode(",", $arguments); |
---|
| 2840 | |
---|
| 2841 | // Run through all arguments. |
---|
[7655] | 2842 | for ( $i = 0; $i < sizeof($arguments); ++$i ) |
---|
[2] | 2843 | { |
---|
| 2844 | // Trim the string. |
---|
| 2845 | $arguments[$i] = trim($arguments[$i]); |
---|
| 2846 | |
---|
| 2847 | // Evaluate each argument. |
---|
| 2848 | $arguments[$i] = $this->evaluate_predicate($node, $arguments[$i]); |
---|
| 2849 | } |
---|
| 2850 | |
---|
| 2851 | // Check whether a third argument was given. |
---|
| 2852 | if ( !empty($arguments[2]) ) |
---|
| 2853 | { |
---|
| 2854 | // Return the substring. |
---|
| 2855 | return substr(strval($arguments[0]), $arguments[1] - 1, |
---|
| 2856 | $arguments[2]); |
---|
| 2857 | } |
---|
| 2858 | else |
---|
| 2859 | { |
---|
| 2860 | // Return the substring. |
---|
| 2861 | return substr(strval($arguments[0]), $arguments[1] - 1); |
---|
| 2862 | } |
---|
| 2863 | } |
---|
| 2864 | |
---|
| 2865 | /** |
---|
| 2866 | * Handles the XPath function string-length. |
---|
| 2867 | * |
---|
| 2868 | * This method handles the XPath function string-length. |
---|
| 2869 | * |
---|
| 2870 | * @access private |
---|
| 2871 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2872 | * @param string $node Full path of the node on which the function |
---|
| 2873 | * should be processed. |
---|
| 2874 | * @param string $arguments String containing the arguments that were |
---|
| 2875 | * passed to the function. |
---|
| 2876 | * @return mixed Depending on the type of function being processed this |
---|
| 2877 | * method returns different types. |
---|
| 2878 | * @see evaluate() |
---|
| 2879 | */ |
---|
| 2880 | function handle_function_string_length ( $node, $arguments ) |
---|
| 2881 | { |
---|
| 2882 | // Trim the argument. |
---|
| 2883 | $arguments = trim($arguments); |
---|
| 2884 | |
---|
| 2885 | // Evaluate the argument. |
---|
| 2886 | $arguments = $this->evaluate_predicate($node, $arguments); |
---|
| 2887 | |
---|
| 2888 | // Return the length of the string. |
---|
| 2889 | return strlen(strval($arguments)); |
---|
| 2890 | } |
---|
| 2891 | |
---|
| 2892 | /** |
---|
| 2893 | * Handles the XPath function translate. |
---|
| 2894 | * |
---|
| 2895 | * This method handles the XPath function translate. |
---|
| 2896 | * |
---|
| 2897 | * @access private |
---|
| 2898 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2899 | * @param string $node Full path of the node on which the function |
---|
| 2900 | * should be processed. |
---|
| 2901 | * @param string $arguments String containing the arguments that were |
---|
| 2902 | * passed to the function. |
---|
| 2903 | * @return mixed Depending on the type of function being processed this |
---|
| 2904 | * method returns different types. |
---|
| 2905 | * @see evaluate() |
---|
| 2906 | */ |
---|
| 2907 | function handle_function_translate ( $node, $arguments ) |
---|
| 2908 | { |
---|
| 2909 | // Split the arguments. |
---|
| 2910 | $arguments = explode(",", $arguments); |
---|
| 2911 | |
---|
| 2912 | // Run through all arguments. |
---|
[7655] | 2913 | for ( $i = 0; $i < sizeof($arguments); ++$i ) |
---|
[2] | 2914 | { |
---|
| 2915 | // Trim the argument. |
---|
| 2916 | $arguments[$i] = trim($arguments[$i]); |
---|
| 2917 | |
---|
| 2918 | // Evaluate the argument. |
---|
| 2919 | $arguments[$i] = $this->evaluate_predicate($node, $arguments[$i]); |
---|
| 2920 | } |
---|
| 2921 | |
---|
| 2922 | // Return the translated string. |
---|
| 2923 | return strtr($arguments[0], $arguments[1], $arguments[2]); |
---|
| 2924 | } |
---|
| 2925 | |
---|
| 2926 | /** |
---|
| 2927 | * Handles the XPath function boolean. |
---|
| 2928 | * |
---|
| 2929 | * This method handles the XPath function boolean. |
---|
| 2930 | * |
---|
| 2931 | * @access private |
---|
| 2932 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2933 | * @param string $node Full path of the node on which the function |
---|
| 2934 | * should be processed. |
---|
| 2935 | * @param string $arguments String containing the arguments that were |
---|
| 2936 | * passed to the function. |
---|
| 2937 | * @return mixed Depending on the type of function being processed this |
---|
| 2938 | * method returns different types. |
---|
| 2939 | * @see evaluate() |
---|
| 2940 | */ |
---|
| 2941 | function handle_function_boolean ( $node, $arguments ) |
---|
| 2942 | { |
---|
| 2943 | // Trim the arguments. |
---|
| 2944 | $arguments = trim($arguments); |
---|
| 2945 | |
---|
| 2946 | // Check what type of parameter is given |
---|
[5912] | 2947 | if ( preg_match('/^[0-9]+(\.[0-9]+)?$/', $arguments) || |
---|
| 2948 | preg_match('/^\.[0-9]+$/', $arguments) ) |
---|
[2] | 2949 | { |
---|
| 2950 | // Convert the digits to a number. |
---|
| 2951 | $number = doubleval($arguments); |
---|
| 2952 | |
---|
| 2953 | // Check whether the number zero. |
---|
| 2954 | if ( $number == 0 ) |
---|
| 2955 | { |
---|
| 2956 | // Return false. |
---|
| 2957 | return false; |
---|
| 2958 | } |
---|
| 2959 | else |
---|
| 2960 | { |
---|
| 2961 | // Return true. |
---|
| 2962 | return true; |
---|
| 2963 | } |
---|
| 2964 | } |
---|
| 2965 | elseif ( empty($arguments) ) |
---|
| 2966 | { |
---|
| 2967 | // Sorry, there were no arguments. |
---|
| 2968 | return false; |
---|
| 2969 | } |
---|
| 2970 | else |
---|
| 2971 | { |
---|
| 2972 | // Try to evaluate the argument as an XPath. |
---|
| 2973 | $result = $this->evaluate($arguments, $node); |
---|
| 2974 | |
---|
| 2975 | // Check whether we found something. |
---|
| 2976 | if ( count($result) > 0 ) |
---|
| 2977 | { |
---|
| 2978 | // Return true. |
---|
| 2979 | return true; |
---|
| 2980 | } |
---|
| 2981 | else |
---|
| 2982 | { |
---|
| 2983 | // Return false. |
---|
| 2984 | return false; |
---|
| 2985 | } |
---|
| 2986 | } |
---|
| 2987 | } |
---|
| 2988 | |
---|
| 2989 | /** |
---|
| 2990 | * Handles the XPath function not. |
---|
| 2991 | * |
---|
| 2992 | * This method handles the XPath function not. |
---|
| 2993 | * |
---|
| 2994 | * @access private |
---|
| 2995 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 2996 | * @param string $node Full path of the node on which the function |
---|
| 2997 | * should be processed. |
---|
| 2998 | * @param string $arguments String containing the arguments that were |
---|
| 2999 | * passed to the function. |
---|
| 3000 | * @return mixed Depending on the type of function being processed this |
---|
| 3001 | * method returns different types. |
---|
| 3002 | * @see evaluate() |
---|
| 3003 | */ |
---|
| 3004 | function handle_function_not ( $node, $arguments ) |
---|
| 3005 | { |
---|
| 3006 | // Trim the arguments. |
---|
| 3007 | $arguments = trim($arguments); |
---|
| 3008 | |
---|
| 3009 | // Return the negative value of the content of the brackets. |
---|
| 3010 | return !$this->evaluate_predicate($node, $arguments); |
---|
| 3011 | } |
---|
| 3012 | |
---|
| 3013 | /** |
---|
| 3014 | * Handles the XPath function true. |
---|
| 3015 | * |
---|
| 3016 | * This method handles the XPath function true. |
---|
| 3017 | * |
---|
| 3018 | * @access private |
---|
| 3019 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3020 | * @param string $node Full path of the node on which the function |
---|
| 3021 | * should be processed. |
---|
| 3022 | * @param string $arguments String containing the arguments that were |
---|
| 3023 | * passed to the function. |
---|
| 3024 | * @return mixed Depending on the type of function being processed this |
---|
| 3025 | * method returns different types. |
---|
| 3026 | * @see evaluate() |
---|
| 3027 | */ |
---|
| 3028 | function handle_function_true ( $node, $arguments ) |
---|
| 3029 | { |
---|
| 3030 | // Return true. |
---|
| 3031 | return true; |
---|
| 3032 | } |
---|
| 3033 | |
---|
| 3034 | /** |
---|
| 3035 | * Handles the XPath function false. |
---|
| 3036 | * |
---|
| 3037 | * This method handles the XPath function false. |
---|
| 3038 | * |
---|
| 3039 | * @access private |
---|
| 3040 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3041 | * @param string $node Full path of the node on which the function |
---|
| 3042 | * should be processed. |
---|
| 3043 | * @param string $arguments String containing the arguments that were |
---|
| 3044 | * passed to the function. |
---|
| 3045 | * @return mixed Depending on the type of function being processed this |
---|
| 3046 | * method returns different types. |
---|
| 3047 | * @see evaluate() |
---|
| 3048 | */ |
---|
| 3049 | function handle_function_false ( $node, $arguments ) |
---|
| 3050 | { |
---|
| 3051 | // Return false. |
---|
| 3052 | return false; |
---|
| 3053 | } |
---|
| 3054 | |
---|
| 3055 | /** |
---|
| 3056 | * Handles the XPath function lang. |
---|
| 3057 | * |
---|
| 3058 | * This method handles the XPath function lang. |
---|
| 3059 | * |
---|
| 3060 | * @access private |
---|
| 3061 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3062 | * @param string $node Full path of the node on which the function |
---|
| 3063 | * should be processed. |
---|
| 3064 | * @param string $arguments String containing the arguments that were |
---|
| 3065 | * passed to the function. |
---|
| 3066 | * @return mixed Depending on the type of function being processed this |
---|
| 3067 | * method returns different types. |
---|
| 3068 | * @see evaluate() |
---|
| 3069 | */ |
---|
| 3070 | function handle_function_lang ( $node, $arguments ) |
---|
| 3071 | { |
---|
| 3072 | // Trim the arguments. |
---|
| 3073 | $arguments = trim($arguments); |
---|
| 3074 | |
---|
| 3075 | // Check whether the node has an language attribute. |
---|
| 3076 | if ( empty($this->nodes[$node]["attributes"]["xml:lang"]) ) |
---|
| 3077 | { |
---|
| 3078 | // Run through the ancestors. |
---|
| 3079 | while ( !empty($node) ) |
---|
| 3080 | { |
---|
| 3081 | // Select the parent node. |
---|
| 3082 | $node = $this->nodes[$node]["parent"]; |
---|
| 3083 | |
---|
| 3084 | // Check whether there's a language definition. |
---|
| 3085 | if ( !empty($this->nodes[$node]["attributes"]["xml:lang"]) ) |
---|
| 3086 | { |
---|
| 3087 | // Check whether it's the language, the user asks for. |
---|
[5928] | 3088 | if ( preg_match("/^$arguments/i", $this->nodes[$node] |
---|
[2] | 3089 | ["attributes"]["xml:lang"]) ) |
---|
| 3090 | { |
---|
| 3091 | // Return true. |
---|
| 3092 | return true; |
---|
| 3093 | } |
---|
| 3094 | else |
---|
| 3095 | { |
---|
| 3096 | // Return false. |
---|
| 3097 | return false; |
---|
| 3098 | } |
---|
| 3099 | } |
---|
| 3100 | } |
---|
| 3101 | |
---|
| 3102 | // Return false. |
---|
| 3103 | return false; |
---|
| 3104 | } |
---|
| 3105 | else |
---|
| 3106 | { |
---|
| 3107 | // Check whether it's the language, the user asks for. |
---|
[5928] | 3108 | if ( preg_match("/^$arguments/i", $this->nodes[$node]["attributes"] |
---|
[2] | 3109 | ["xml:lang"]) ) |
---|
| 3110 | { |
---|
| 3111 | // Return true. |
---|
| 3112 | return true; |
---|
| 3113 | } |
---|
| 3114 | else |
---|
| 3115 | { |
---|
| 3116 | // Return false. |
---|
| 3117 | return false; |
---|
| 3118 | } |
---|
| 3119 | } |
---|
| 3120 | } |
---|
| 3121 | |
---|
| 3122 | /** |
---|
| 3123 | * Handles the XPath function number. |
---|
| 3124 | * |
---|
| 3125 | * This method handles the XPath function number. |
---|
| 3126 | * |
---|
| 3127 | * @access private |
---|
| 3128 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3129 | * @param string $node Full path of the node on which the function |
---|
| 3130 | * should be processed. |
---|
| 3131 | * @param string $arguments String containing the arguments that were |
---|
| 3132 | * passed to the function. |
---|
| 3133 | * @return mixed Depending on the type of function being processed this |
---|
| 3134 | * method returns different types. |
---|
| 3135 | * @see evaluate() |
---|
| 3136 | */ |
---|
| 3137 | function handle_function_number ( $node, $arguments ) |
---|
| 3138 | { |
---|
| 3139 | // Check the type of argument. |
---|
[5912] | 3140 | if ( preg_match('/^[0-9]+(\.[0-9]+)?$/', $arguments) || |
---|
| 3141 | preg_match('/^\.[0-9]+$/', $arguments) ) |
---|
[2] | 3142 | { |
---|
| 3143 | // Return the argument as a number. |
---|
| 3144 | return doubleval($arguments); |
---|
| 3145 | } |
---|
| 3146 | elseif ( is_bool($arguments) ) |
---|
| 3147 | { |
---|
| 3148 | // Check whether it's true. |
---|
| 3149 | if ( $arguments == true ) |
---|
| 3150 | { |
---|
| 3151 | // Return 1. |
---|
| 3152 | return 1; |
---|
| 3153 | } |
---|
| 3154 | else |
---|
| 3155 | { |
---|
| 3156 | // Return 0. |
---|
| 3157 | return 0; |
---|
| 3158 | } |
---|
| 3159 | } |
---|
| 3160 | } |
---|
| 3161 | |
---|
| 3162 | /** |
---|
| 3163 | * Handles the XPath function sum. |
---|
| 3164 | * |
---|
| 3165 | * This method handles the XPath function sum. |
---|
| 3166 | * |
---|
| 3167 | * @access private |
---|
| 3168 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3169 | * @param string $node Full path of the node on which the function |
---|
| 3170 | * should be processed. |
---|
| 3171 | * @param string $arguments String containing the arguments that were |
---|
| 3172 | * passed to the function. |
---|
| 3173 | * @return mixed Depending on the type of function being processed this |
---|
| 3174 | * method returns different types. |
---|
| 3175 | * @see evaluate() |
---|
| 3176 | */ |
---|
| 3177 | function handle_function_sum ( $node, $arguments ) |
---|
| 3178 | { |
---|
| 3179 | // Trim the arguments. |
---|
| 3180 | $arguments = trim($arguments); |
---|
| 3181 | |
---|
| 3182 | // Evaluate the arguments as an XPath expression. |
---|
| 3183 | $results = $this->evaluate($arguments, $node); |
---|
| 3184 | |
---|
| 3185 | // Create a variable to save the sum. |
---|
| 3186 | $sum = 0; |
---|
| 3187 | |
---|
| 3188 | // Run through all results. |
---|
| 3189 | foreach ( $results as $result ) |
---|
| 3190 | { |
---|
| 3191 | // Get the value of the node. |
---|
| 3192 | $result = $this->get_content($result); |
---|
| 3193 | |
---|
| 3194 | // Add it to the sum. |
---|
| 3195 | $sum += doubleval($result); |
---|
| 3196 | } |
---|
| 3197 | |
---|
| 3198 | // Return the sum. |
---|
| 3199 | return $sum; |
---|
| 3200 | } |
---|
| 3201 | |
---|
| 3202 | /** |
---|
| 3203 | * Handles the XPath function floor. |
---|
| 3204 | * |
---|
| 3205 | * This method handles the XPath function floor. |
---|
| 3206 | * |
---|
| 3207 | * @access private |
---|
| 3208 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3209 | * @param string $node Full path of the node on which the function |
---|
| 3210 | * should be processed. |
---|
| 3211 | * @param string $arguments String containing the arguments that were |
---|
| 3212 | * passed to the function. |
---|
| 3213 | * @return mixed Depending on the type of function being processed this |
---|
| 3214 | * method returns different types. |
---|
| 3215 | * @see evaluate() |
---|
| 3216 | */ |
---|
| 3217 | function handle_function_floor ( $node, $arguments ) |
---|
| 3218 | { |
---|
| 3219 | // Trim the arguments. |
---|
| 3220 | $arguments = trim($arguments); |
---|
| 3221 | |
---|
| 3222 | // Convert the arguments to a number. |
---|
| 3223 | $arguments = doubleval($arguments); |
---|
| 3224 | |
---|
| 3225 | // Return the result |
---|
| 3226 | return floor($arguments); |
---|
| 3227 | } |
---|
| 3228 | |
---|
| 3229 | /** |
---|
| 3230 | * Handles the XPath function ceiling. |
---|
| 3231 | * |
---|
| 3232 | * This method handles the XPath function ceiling. |
---|
| 3233 | * |
---|
| 3234 | * @access private |
---|
| 3235 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3236 | * @param string $node Full path of the node on which the function |
---|
| 3237 | * should be processed. |
---|
| 3238 | * @param string $arguments String containing the arguments that were |
---|
| 3239 | * passed to the function. |
---|
| 3240 | * @return mixed Depending on the type of function being processed this |
---|
| 3241 | * method returns different types. |
---|
| 3242 | * @see evaluate() |
---|
| 3243 | */ |
---|
| 3244 | function handle_function_ceiling ( $node, $arguments ) |
---|
| 3245 | { |
---|
| 3246 | // Trim the arguments. |
---|
| 3247 | $arguments = trim($arguments); |
---|
| 3248 | |
---|
| 3249 | // Convert the arguments to a number. |
---|
| 3250 | $arguments = doubleval($arguments); |
---|
| 3251 | |
---|
| 3252 | // Return the result |
---|
| 3253 | return ceil($arguments); |
---|
| 3254 | } |
---|
| 3255 | |
---|
| 3256 | /** |
---|
| 3257 | * Handles the XPath function round. |
---|
| 3258 | * |
---|
| 3259 | * This method handles the XPath function round. |
---|
| 3260 | * |
---|
| 3261 | * @access private |
---|
| 3262 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3263 | * @param string $node Full path of the node on which the function |
---|
| 3264 | * should be processed. |
---|
| 3265 | * @param string $arguments String containing the arguments that were |
---|
| 3266 | * passed to the function. |
---|
| 3267 | * @return mixed Depending on the type of function being processed this |
---|
| 3268 | * method returns different types. |
---|
| 3269 | * @see evaluate() |
---|
| 3270 | */ |
---|
| 3271 | function handle_function_round ( $node, $arguments ) |
---|
| 3272 | { |
---|
| 3273 | // Trim the arguments. |
---|
| 3274 | $arguments = trim($arguments); |
---|
| 3275 | |
---|
| 3276 | // Convert the arguments to a number. |
---|
| 3277 | $arguments = doubleval($arguments); |
---|
| 3278 | |
---|
| 3279 | // Return the result |
---|
| 3280 | return round($arguments); |
---|
| 3281 | } |
---|
| 3282 | |
---|
| 3283 | /** |
---|
| 3284 | * Handles the XPath function text. |
---|
| 3285 | * |
---|
| 3286 | * This method handles the XPath function text. |
---|
| 3287 | * |
---|
| 3288 | * @access private |
---|
| 3289 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3290 | * @param string $node Full path of the node on which the function |
---|
| 3291 | * should be processed. |
---|
| 3292 | * @param string $arguments String containing the arguments that were |
---|
| 3293 | * passed to the function. |
---|
| 3294 | * @return mixed Depending on the type of function being processed this |
---|
| 3295 | * method returns different types. |
---|
| 3296 | * @see evaluate() |
---|
| 3297 | */ |
---|
| 3298 | function handle_function_text ( $node, $arguments ) |
---|
| 3299 | { |
---|
| 3300 | // Return the character data of the node. |
---|
| 3301 | return $this->nodes[$node]["text"]; |
---|
| 3302 | } |
---|
| 3303 | |
---|
| 3304 | /** |
---|
| 3305 | * Retrieves a substring before a delimiter. |
---|
| 3306 | * |
---|
| 3307 | * This method retrieves everything from a string before a given delimiter, |
---|
| 3308 | * not including the delimiter. |
---|
| 3309 | * |
---|
| 3310 | * @access private |
---|
| 3311 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3312 | * @param string $string String, from which the substring should be |
---|
| 3313 | * extracted. |
---|
| 3314 | * @param string $delimiter String containing the delimiter to use. |
---|
| 3315 | * @return string Substring from the original string before the |
---|
| 3316 | * delimiter. |
---|
| 3317 | * @see afterstr() |
---|
| 3318 | */ |
---|
| 3319 | function prestr ( $string, $delimiter ) |
---|
| 3320 | { |
---|
| 3321 | // Return the substring. |
---|
| 3322 | return substr($string, 0, strlen($string) - strlen(strstr($string, |
---|
| 3323 | "$delimiter"))); |
---|
| 3324 | } |
---|
| 3325 | |
---|
| 3326 | /** |
---|
| 3327 | * Retrieves a substring after a delimiter. |
---|
| 3328 | * |
---|
| 3329 | * This method retrieves everything from a string after a given delimiter, |
---|
| 3330 | * not including the delimiter. |
---|
| 3331 | * |
---|
| 3332 | * @access private |
---|
| 3333 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3334 | * @param string $string String, from which the substring should be |
---|
| 3335 | * extracted. |
---|
| 3336 | * @param string $delimiter String containing the delimiter to use. |
---|
| 3337 | * @return string Substring from the original string after the |
---|
| 3338 | * delimiter. |
---|
| 3339 | * @see prestr() |
---|
| 3340 | */ |
---|
| 3341 | function afterstr ( $string, $delimiter ) |
---|
| 3342 | { |
---|
| 3343 | // Return the substring. |
---|
| 3344 | return substr($string, |
---|
| 3345 | strpos($string, $delimiter) + strlen($delimiter)); |
---|
| 3346 | } |
---|
| 3347 | |
---|
| 3348 | /** |
---|
| 3349 | * Displays an error message. |
---|
| 3350 | * |
---|
| 3351 | * This method displays an error messages and stops the execution of the |
---|
| 3352 | * script. This method is called exactly in the same way as the printf |
---|
| 3353 | * function. The first argument contains the message and additional |
---|
| 3354 | * arguments of various types may be passed to this method to be inserted |
---|
| 3355 | * into the message. |
---|
| 3356 | * |
---|
| 3357 | * @access private |
---|
| 3358 | * @author Michael P. Mehl <mpm@phpxml.org> |
---|
| 3359 | * @param string $message Error message to be displayed. |
---|
| 3360 | */ |
---|
| 3361 | function display_error ( $message ) |
---|
| 3362 | { |
---|
| 3363 | // Check whether more than one argument was given. |
---|
| 3364 | if ( func_num_args() > 1 ) |
---|
| 3365 | { |
---|
| 3366 | // Read all arguments. |
---|
| 3367 | $arguments = func_get_args(); |
---|
| 3368 | |
---|
| 3369 | // Create a new string for the inserting command. |
---|
| 3370 | $command = "\$message = sprintf(\$message, "; |
---|
| 3371 | |
---|
| 3372 | // Run through the array of arguments. |
---|
[7655] | 3373 | for ( $i = 1; $i < sizeof($arguments); ++$i ) |
---|
[2] | 3374 | { |
---|
| 3375 | // Add the number of the argument to the command. |
---|
| 3376 | $command .= "\$arguments[".$i."], "; |
---|
| 3377 | } |
---|
| 3378 | |
---|
| 3379 | // Replace the last separator. |
---|
[6037] | 3380 | $command = preg_replace('/, $/i', ');', $command); |
---|
[2] | 3381 | |
---|
| 3382 | // Execute the command. |
---|
| 3383 | eval($command); |
---|
| 3384 | } |
---|
| 3385 | |
---|
| 3386 | // Display the error message. |
---|
| 3387 | echo "<b>phpXML error:</b> ".$message; |
---|
| 3388 | |
---|
| 3389 | // End the execution of this script. |
---|
| 3390 | exit; |
---|
| 3391 | } |
---|
| 3392 | } |
---|
| 3393 | |
---|
| 3394 | ?> |
---|