[2] | 1 | <?php |
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| 2 | /** |
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| 3 | * @version V4.50 6 July 2004 (c) 2000-2004 John Lim (jlim@natsoft.com.my). All rights reserved. |
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| 4 | * Released under both BSD license and Lesser GPL library license. |
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| 5 | * Whenever there is any discrepancy between the two licenses, |
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| 6 | * the BSD license will take precedence. |
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| 7 | * |
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| 8 | * Set tabs to 4 for best viewing. |
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| 9 | * |
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| 10 | * PEAR DB Emulation Layer for ADODB. |
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| 11 | * |
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| 12 | * The following code is modelled on PEAR DB code by Stig Bakken <ssb@fast.no> | |
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| 13 | * and Tomas V.V.Cox <cox@idecnet.com>. Portions (c)1997-2002 The PHP Group. |
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| 14 | */ |
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| 15 | |
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| 16 | /* |
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| 17 | We support: |
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| 18 | |
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| 19 | DB_Common |
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| 20 | --------- |
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| 21 | query - returns PEAR_Error on error |
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| 22 | limitQuery - return PEAR_Error on error |
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| 23 | prepare - does not return PEAR_Error on error |
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| 24 | execute - does not return PEAR_Error on error |
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| 25 | setFetchMode - supports ASSOC and ORDERED |
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| 26 | errorNative |
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| 27 | quote |
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| 28 | nextID |
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| 29 | disconnect |
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| 30 | |
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| 31 | getOne |
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| 32 | getAssoc |
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| 33 | getRow |
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| 34 | getCol |
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| 35 | getAll |
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| 36 | |
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| 37 | DB_Result |
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| 38 | --------- |
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| 39 | numRows - returns -1 if not supported |
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| 40 | numCols |
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| 41 | fetchInto - does not support passing of fetchmode |
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| 42 | fetchRows - does not support passing of fetchmode |
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| 43 | free |
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| 44 | */ |
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| 45 | |
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| 46 | define('ADODB_PEAR',dirname(__FILE__)); |
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| 47 | include_once "PEAR.php"; |
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| 48 | include_once ADODB_PEAR."/adodb-errorpear.inc.php"; |
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| 49 | include_once ADODB_PEAR."/adodb.inc.php"; |
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| 50 | |
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| 51 | if (!defined('DB_OK')) { |
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| 52 | define("DB_OK", 1); |
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| 53 | define("DB_ERROR",-1); |
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| 54 | /** |
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| 55 | * This is a special constant that tells DB the user hasn't specified |
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| 56 | * any particular get mode, so the default should be used. |
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| 57 | */ |
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| 58 | |
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| 59 | define('DB_FETCHMODE_DEFAULT', 0); |
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| 60 | |
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| 61 | /** |
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| 62 | * Column data indexed by numbers, ordered from 0 and up |
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| 63 | */ |
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| 64 | |
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| 65 | define('DB_FETCHMODE_ORDERED', 1); |
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| 66 | |
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| 67 | /** |
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| 68 | * Column data indexed by column names |
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| 69 | */ |
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| 70 | |
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| 71 | define('DB_FETCHMODE_ASSOC', 2); |
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| 72 | |
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| 73 | /* for compatibility */ |
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| 74 | |
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| 75 | define('DB_GETMODE_ORDERED', DB_FETCHMODE_ORDERED); |
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| 76 | define('DB_GETMODE_ASSOC', DB_FETCHMODE_ASSOC); |
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| 77 | |
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| 78 | /** |
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| 79 | * these are constants for the tableInfo-function |
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| 80 | * they are bitwised or'ed. so if there are more constants to be defined |
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| 81 | * in the future, adjust DB_TABLEINFO_FULL accordingly |
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| 82 | */ |
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| 83 | |
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| 84 | define('DB_TABLEINFO_ORDER', 1); |
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| 85 | define('DB_TABLEINFO_ORDERTABLE', 2); |
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| 86 | define('DB_TABLEINFO_FULL', 3); |
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| 87 | } |
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| 88 | |
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| 89 | /** |
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| 90 | * The main "DB" class is simply a container class with some static |
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| 91 | * methods for creating DB objects as well as some utility functions |
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| 92 | * common to all parts of DB. |
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| 93 | * |
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| 94 | */ |
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| 95 | |
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| 96 | class DB |
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| 97 | { |
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| 98 | /** |
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| 99 | * Create a new DB object for the specified database type |
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| 100 | * |
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| 101 | * @param $type string database type, for example "mysql" |
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| 102 | * |
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| 103 | * @return object a newly created DB object, or a DB error code on |
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| 104 | * error |
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| 105 | */ |
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| 106 | |
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| 107 | function &factory($type) |
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| 108 | { |
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| 109 | include_once(ADODB_DIR."/drivers/adodb-$type.inc.php"); |
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| 110 | $obj = &NewADOConnection($type); |
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| 111 | if (!is_object($obj)) $obj =& new PEAR_Error('Unknown Database Driver: '.$dsninfo['phptype'],-1); |
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| 112 | return $obj; |
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| 113 | } |
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| 114 | |
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| 115 | /** |
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| 116 | * Create a new DB object and connect to the specified database |
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| 117 | * |
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| 118 | * @param $dsn mixed "data source name", see the DB::parseDSN |
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| 119 | * method for a description of the dsn format. Can also be |
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| 120 | * specified as an array of the format returned by DB::parseDSN. |
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| 121 | * |
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| 122 | * @param $options mixed if boolean (or scalar), tells whether |
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| 123 | * this connection should be persistent (for backends that support |
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| 124 | * this). This parameter can also be an array of options, see |
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| 125 | * DB_common::setOption for more information on connection |
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| 126 | * options. |
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| 127 | * |
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| 128 | * @return object a newly created DB connection object, or a DB |
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| 129 | * error object on error |
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| 130 | * |
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| 131 | * @see DB::parseDSN |
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| 132 | * @see DB::isError |
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| 133 | */ |
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| 134 | function &connect($dsn, $options = false) |
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| 135 | { |
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| 136 | if (is_array($dsn)) { |
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| 137 | $dsninfo = $dsn; |
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| 138 | } else { |
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| 139 | $dsninfo = DB::parseDSN($dsn); |
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| 140 | } |
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| 141 | switch ($dsninfo["phptype"]) { |
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| 142 | case 'pgsql': $type = 'postgres7'; break; |
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| 143 | case 'ifx': $type = 'informix9'; break; |
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| 144 | default: $type = $dsninfo["phptype"]; break; |
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| 145 | } |
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| 146 | |
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| 147 | if (is_array($options) && isset($options["debug"]) && |
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| 148 | $options["debug"] >= 2) { |
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| 149 | // expose php errors with sufficient debug level |
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| 150 | @include_once("adodb-$type.inc.php"); |
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| 151 | } else { |
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| 152 | @include_once("adodb-$type.inc.php"); |
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| 153 | } |
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| 154 | |
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| 155 | @$obj =& NewADOConnection($type); |
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| 156 | if (!is_object($obj)) { |
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| 157 | $obj =& new PEAR_Error('Unknown Database Driver: '.$dsninfo['phptype'],-1); |
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| 158 | return $obj; |
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| 159 | } |
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| 160 | if (is_array($options)) { |
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| 161 | foreach($options as $k => $v) { |
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| 162 | switch(strtolower($k)) { |
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| 163 | case 'persistent': $persist = $v; break; |
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| 164 | #ibase |
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| 165 | case 'dialect': $obj->dialect = $v; break; |
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| 166 | case 'charset': $obj->charset = $v; break; |
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| 167 | case 'buffers': $obj->buffers = $v; break; |
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| 168 | #ado |
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| 169 | case 'charpage': $obj->charPage = $v; break; |
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| 170 | #mysql |
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| 171 | case 'clientflags': $obj->clientFlags = $v; break; |
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| 172 | } |
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| 173 | } |
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| 174 | } else { |
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| 175 | $persist = false; |
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| 176 | } |
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| 177 | |
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| 178 | if (isset($dsninfo['socket'])) $dsninfo['hostspec'] .= ':'.$dsninfo['socket']; |
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| 179 | else if (isset($dsninfo['port'])) $dsninfo['hostspec'] .= ':'.$dsninfo['port']; |
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| 180 | |
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| 181 | if($persist) $ok = $obj->PConnect($dsninfo['hostspec'], $dsninfo['username'],$dsninfo['password'],$dsninfo['database']); |
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| 182 | else $ok = $obj->Connect($dsninfo['hostspec'], $dsninfo['username'],$dsninfo['password'],$dsninfo['database']); |
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| 183 | |
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| 184 | if (!$ok) $obj = ADODB_PEAR_Error(); |
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| 185 | return $obj; |
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| 186 | } |
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| 187 | |
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| 188 | /** |
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| 189 | * Return the DB API version |
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| 190 | * |
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| 191 | * @return int the DB API version number |
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| 192 | */ |
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| 193 | function apiVersion() |
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| 194 | { |
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| 195 | return 2; |
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| 196 | } |
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| 197 | |
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| 198 | /** |
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| 199 | * Tell whether a result code from a DB method is an error |
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| 200 | * |
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| 201 | * @param $value int result code |
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| 202 | * |
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| 203 | * @return bool whether $value is an error |
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| 204 | */ |
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| 205 | function isError($value) |
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| 206 | { |
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| 207 | return (is_object($value) && |
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| 208 | (get_class($value) == 'db_error' || |
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| 209 | is_subclass_of($value, 'db_error'))); |
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| 210 | } |
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| 211 | |
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| 212 | |
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| 213 | /** |
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| 214 | * Tell whether a result code from a DB method is a warning. |
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| 215 | * Warnings differ from errors in that they are generated by DB, |
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| 216 | * and are not fatal. |
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| 217 | * |
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| 218 | * @param $value mixed result value |
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| 219 | * |
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| 220 | * @return bool whether $value is a warning |
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| 221 | */ |
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| 222 | function isWarning($value) |
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| 223 | { |
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| 224 | return is_object($value) && |
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| 225 | (get_class( $value ) == "db_warning" || |
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| 226 | is_subclass_of($value, "db_warning")); |
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| 227 | } |
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| 228 | |
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| 229 | /** |
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| 230 | * Parse a data source name |
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| 231 | * |
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| 232 | * @param $dsn string Data Source Name to be parsed |
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| 233 | * |
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| 234 | * @return array an associative array with the following keys: |
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| 235 | * |
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| 236 | * phptype: Database backend used in PHP (mysql, odbc etc.) |
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| 237 | * dbsyntax: Database used with regards to SQL syntax etc. |
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| 238 | * protocol: Communication protocol to use (tcp, unix etc.) |
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| 239 | * hostspec: Host specification (hostname[:port]) |
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| 240 | * database: Database to use on the DBMS server |
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| 241 | * username: User name for login |
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| 242 | * password: Password for login |
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| 243 | * |
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| 244 | * The format of the supplied DSN is in its fullest form: |
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| 245 | * |
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| 246 | * phptype(dbsyntax)://username:password@protocol+hostspec/database |
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| 247 | * |
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| 248 | * Most variations are allowed: |
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| 249 | * |
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| 250 | * phptype://username:password@protocol+hostspec:110//usr/db_file.db |
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| 251 | * phptype://username:password@hostspec/database_name |
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| 252 | * phptype://username:password@hostspec |
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| 253 | * phptype://username@hostspec |
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| 254 | * phptype://hostspec/database |
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| 255 | * phptype://hostspec |
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| 256 | * phptype(dbsyntax) |
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| 257 | * phptype |
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| 258 | * |
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| 259 | * @author Tomas V.V.Cox <cox@idecnet.com> |
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| 260 | */ |
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| 261 | function parseDSN($dsn) |
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| 262 | { |
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| 263 | if (is_array($dsn)) { |
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| 264 | return $dsn; |
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| 265 | } |
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| 266 | |
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| 267 | $parsed = array( |
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| 268 | 'phptype' => false, |
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| 269 | 'dbsyntax' => false, |
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| 270 | 'protocol' => false, |
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| 271 | 'hostspec' => false, |
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| 272 | 'database' => false, |
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| 273 | 'username' => false, |
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| 274 | 'password' => false |
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| 275 | ); |
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| 276 | |
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| 277 | // Find phptype and dbsyntax |
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| 278 | if (($pos = strpos($dsn, '://')) !== false) { |
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| 279 | $str = substr($dsn, 0, $pos); |
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| 280 | $dsn = substr($dsn, $pos + 3); |
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| 281 | } else { |
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| 282 | $str = $dsn; |
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| 283 | $dsn = NULL; |
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| 284 | } |
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| 285 | |
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| 286 | // Get phptype and dbsyntax |
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| 287 | // $str => phptype(dbsyntax) |
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| 288 | if (preg_match('|^(.+?)\((.*?)\)$|', $str, $arr)) { |
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| 289 | $parsed['phptype'] = $arr[1]; |
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| 290 | $parsed['dbsyntax'] = (empty($arr[2])) ? $arr[1] : $arr[2]; |
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| 291 | } else { |
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| 292 | $parsed['phptype'] = $str; |
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| 293 | $parsed['dbsyntax'] = $str; |
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| 294 | } |
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| 295 | |
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| 296 | if (empty($dsn)) { |
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| 297 | return $parsed; |
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| 298 | } |
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| 299 | |
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| 300 | // Get (if found): username and password |
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| 301 | // $dsn => username:password@protocol+hostspec/database |
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| 302 | if (($at = strpos($dsn,'@')) !== false) { |
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| 303 | $str = substr($dsn, 0, $at); |
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| 304 | $dsn = substr($dsn, $at + 1); |
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| 305 | if (($pos = strpos($str, ':')) !== false) { |
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| 306 | $parsed['username'] = urldecode(substr($str, 0, $pos)); |
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| 307 | $parsed['password'] = urldecode(substr($str, $pos + 1)); |
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| 308 | } else { |
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| 309 | $parsed['username'] = urldecode($str); |
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| 310 | } |
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| 311 | } |
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| 312 | |
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| 313 | // Find protocol and hostspec |
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| 314 | // $dsn => protocol+hostspec/database |
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| 315 | if (($pos=strpos($dsn, '/')) !== false) { |
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| 316 | $str = substr($dsn, 0, $pos); |
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| 317 | $dsn = substr($dsn, $pos + 1); |
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| 318 | } else { |
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| 319 | $str = $dsn; |
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| 320 | $dsn = NULL; |
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| 321 | } |
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| 322 | |
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| 323 | // Get protocol + hostspec |
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| 324 | // $str => protocol+hostspec |
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| 325 | if (($pos=strpos($str, '+')) !== false) { |
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| 326 | $parsed['protocol'] = substr($str, 0, $pos); |
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| 327 | $parsed['hostspec'] = urldecode(substr($str, $pos + 1)); |
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| 328 | } else { |
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| 329 | $parsed['hostspec'] = urldecode($str); |
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| 330 | } |
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| 331 | |
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| 332 | // Get dabase if any |
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| 333 | // $dsn => database |
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| 334 | if (!empty($dsn)) { |
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| 335 | $parsed['database'] = $dsn; |
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| 336 | } |
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| 337 | |
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| 338 | return $parsed; |
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| 339 | } |
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| 340 | |
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| 341 | /** |
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| 342 | * Load a PHP database extension if it is not loaded already. |
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| 343 | * |
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| 344 | * @access public |
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| 345 | * |
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| 346 | * @param $name the base name of the extension (without the .so or |
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| 347 | * .dll suffix) |
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| 348 | * |
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| 349 | * @return bool true if the extension was already or successfully |
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| 350 | * loaded, false if it could not be loaded |
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| 351 | */ |
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| 352 | function assertExtension($name) |
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| 353 | { |
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| 354 | if (!extension_loaded($name)) { |
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| 355 | $dlext = (strncmp(PHP_OS,'WIN',3) === 0) ? '.dll' : '.so'; |
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| 356 | @dl($name . $dlext); |
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| 357 | } |
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| 358 | if (!extension_loaded($name)) { |
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| 359 | return false; |
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| 360 | } |
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| 361 | return true; |
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| 362 | } |
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| 363 | } |
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| 364 | |
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| 365 | ?> |
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