source: trunk/phpgwapi/inc/fpdf/tutorial/tuto6.htm @ 2

Revision 2, 16.3 KB checked in by niltonneto, 17 years ago (diff)

Removida todas as tags usadas pelo CVS ($Id, $Source).
Primeira versão no CVS externo.
  • Property svn:eol-style set to native
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1<HTML>
2<HEAD>
3<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1">
4<TITLE>Links and flowing text</TITLE>
5<LINK TYPE="text/css" REL="stylesheet" HREF="../fpdf.css">
6</HEAD>
7<BODY>
8<H2>Links and flowing text</H2>
9This tutorial explains how to insert links (internal and external) and shows a new text writing
10mode. It also contains a rudimentary HTML parser.
11<BR>
12<BR>
13<TABLE WIDTH="100%" STYLE="color:#4040C0; border-style:ridge" BORDERCOLORLIGHT="#B0B0E0" BORDERCOLORDARK="#000000" BORDER="2" CELLPADDING=6 CELLSPACING=0 BGCOLOR="#F0F5FF"><TR><TD style="border-width:0px">
14<NOBR><code><font color="#000000">
15&lt;?php<br>define<font class="kw">(</font><font class="str">'FPDF_FONTPATH'</font><font class="kw">,</font><font class="str">'font/'</font><font class="kw">);<br>require(</font><font class="str">'fpdf.php'</font><font class="kw">);<br><br>class </font>PDF <font class="kw">extends </font>FPDF<br><font class="kw">{<br>var </font>$B<font class="kw">;<br>var </font>$I<font class="kw">;<br>var </font>$U<font class="kw">;<br>var </font>$HREF<font class="kw">;<br><br>function </font>PDF<font class="kw">(</font>$orientation<font class="kw">=</font><font class="str">'P'</font><font class="kw">,</font>$unit<font class="kw">=</font><font class="str">'mm'</font><font class="kw">,</font>$format<font class="kw">=</font><font class="str">'A4'</font><font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Call parent constructor<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>FPDF<font class="kw">(</font>$orientation<font class="kw">,</font>$unit<font class="kw">,</font>$format<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Initialization<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>B<font class="kw">=</font>0<font class="kw">;<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>I<font class="kw">=</font>0<font class="kw">;<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>U<font class="kw">=</font>0<font class="kw">;<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>HREF<font class="kw">=</font><font class="str">''</font><font class="kw">;<br>}<br><br>function </font>WriteHTML<font class="kw">(</font>$html<font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//HTML parser<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$html<font class="kw">=</font>str_replace<font class="kw">(</font><font class="str">"\n"</font><font class="kw">,</font><font class="str">' '</font><font class="kw">,</font>$html<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$a<font class="kw">=</font>preg_split<font class="kw">(</font><font class="str">'/&lt;(.*)&gt;/U'</font><font class="kw">,</font>$html<font class="kw">,-</font>1<font class="kw">,</font>PREG_SPLIT_DELIM_CAPTURE<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;foreach(</font>$a <font class="kw">as </font>$i<font class="kw">=&gt;</font>$e<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;{<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(</font>$i<font class="kw">%</font>2<font class="kw">==</font>0<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Text<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="kw">if(</font>$<font class="kw">this-&gt;</font>HREF<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>PutLink<font class="kw">(</font>$<font class="kw">this-&gt;</font>HREF<font class="kw">,</font>$e<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>Write<font class="kw">(</font>5<font class="kw">,</font>$e<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Tag<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="kw">if(</font>$e<font class="kw">{</font>0<font class="kw">}==</font><font class="str">'/'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>CloseTag<font class="kw">(</font>strtoupper<font class="kw">(</font>substr<font class="kw">(</font>$e<font class="kw">,</font>1<font class="kw">)));<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;else<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Extract attributes<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$a2<font class="kw">=</font>explode<font class="kw">(</font><font class="str">' '</font><font class="kw">,</font>$e<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$tag<font class="kw">=</font>strtoupper<font class="kw">(</font>array_shift<font class="kw">(</font>$a2<font class="kw">));<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$attr<font class="kw">=array();<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;foreach(</font>$a2 <font class="kw">as </font>$v<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(</font>ereg<font class="kw">(</font><font class="str">'^([^=]*)=["\']?([^"\']*)["\']?$'</font><font class="kw">,</font>$v<font class="kw">,</font>$a3<font class="kw">))<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$attr<font class="kw">[</font>strtoupper<font class="kw">(</font>$a3<font class="kw">[</font>1<font class="kw">])]=</font>$a3<font class="kw">[</font>2<font class="kw">];<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>OpenTag<font class="kw">(</font>$tag<font class="kw">,</font>$attr<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br>&nbsp;&nbsp;&nbsp;&nbsp;}<br>}<br><br>function </font>OpenTag<font class="kw">(</font>$tag<font class="kw">,</font>$attr<font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Opening tag<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="kw">if(</font>$tag<font class="kw">==</font><font class="str">'B' </font><font class="kw">or </font>$tag<font class="kw">==</font><font class="str">'I' </font><font class="kw">or </font>$tag<font class="kw">==</font><font class="str">'U'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetStyle<font class="kw">(</font>$tag<font class="kw">,</font>true<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;if(</font>$tag<font class="kw">==</font><font class="str">'A'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>HREF<font class="kw">=</font>$attr<font class="kw">[</font><font class="str">'HREF'</font><font class="kw">];<br>&nbsp;&nbsp;&nbsp;&nbsp;if(</font>$tag<font class="kw">==</font><font class="str">'BR'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>Ln<font class="kw">(</font>5<font class="kw">);<br>}<br><br>function </font>CloseTag<font class="kw">(</font>$tag<font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Closing tag<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="kw">if(</font>$tag<font class="kw">==</font><font class="str">'B' </font><font class="kw">or </font>$tag<font class="kw">==</font><font class="str">'I' </font><font class="kw">or </font>$tag<font class="kw">==</font><font class="str">'U'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetStyle<font class="kw">(</font>$tag<font class="kw">,</font>false<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;if(</font>$tag<font class="kw">==</font><font class="str">'A'</font><font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>HREF<font class="kw">=</font><font class="str">''</font><font class="kw">;<br>}<br><br>function </font>SetStyle<font class="kw">(</font>$tag<font class="kw">,</font>$enable<font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Modify style and select corresponding font<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>$tag<font class="kw">+=(</font>$enable <font class="kw">? </font>1 <font class="kw">: -</font>1<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$style<font class="kw">=</font><font class="str">''</font><font class="kw">;<br>&nbsp;&nbsp;&nbsp;&nbsp;foreach(array(</font><font class="str">'B'</font><font class="kw">,</font><font class="str">'I'</font><font class="kw">,</font><font class="str">'U'</font><font class="kw">) as </font>$s<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(</font>$<font class="kw">this-&gt;</font>$s<font class="kw">&gt;</font>0<font class="kw">)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>$style<font class="kw">.=</font>$s<font class="kw">;<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetFont<font class="kw">(</font><font class="str">''</font><font class="kw">,</font>$style<font class="kw">);<br>}<br><br>function </font>PutLink<font class="kw">(</font>$URL<font class="kw">,</font>$txt<font class="kw">)<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;</font><font class="cmt">//Put a hyperlink<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetTextColor<font class="kw">(</font>0<font class="kw">,</font>0<font class="kw">,</font>255<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetStyle<font class="kw">(</font><font class="str">'U'</font><font class="kw">,</font>true<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>Write<font class="kw">(</font>5<font class="kw">,</font>$txt<font class="kw">,</font>$URL<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetStyle<font class="kw">(</font><font class="str">'U'</font><font class="kw">,</font>false<font class="kw">);<br>&nbsp;&nbsp;&nbsp;&nbsp;</font>$<font class="kw">this-&gt;</font>SetTextColor<font class="kw">(</font>0<font class="kw">);<br>}<br>}<br><br></font>$html<font class="kw">=</font><font class="str">'You can now easily print text mixing different<br>styles : &lt;B&gt;bold&lt;/B&gt;, &lt;I&gt;italic&lt;/I&gt;, &lt;U&gt;underlined&lt;/U&gt;, or<br>&lt;B&gt;&lt;I&gt;&lt;U&gt;all at once&lt;/U&gt;&lt;/I&gt;&lt;/B&gt;!&lt;BR&gt;You can also insert links<br>on text, such as &lt;A HREF="http://www.fpdf.org"&gt;www.fpdf.org&lt;/A&gt;,<br>or on an image: click on the logo.'</font><font class="kw">;<br><br></font>$pdf<font class="kw">=new </font>PDF<font class="kw">();<br></font><font class="cmt">//First page<br></font>$pdf<font class="kw">-&gt;</font>AddPage<font class="kw">();<br></font>$pdf<font class="kw">-&gt;</font>SetFont<font class="kw">(</font><font class="str">'Arial'</font><font class="kw">,</font><font class="str">''</font><font class="kw">,</font>20<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>Write<font class="kw">(</font>5<font class="kw">,</font><font class="str">'To find out what\'s new in this tutorial, click '</font><font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>SetFont<font class="kw">(</font><font class="str">''</font><font class="kw">,</font><font class="str">'U'</font><font class="kw">);<br></font>$link<font class="kw">=</font>$pdf<font class="kw">-&gt;</font>AddLink<font class="kw">();<br></font>$pdf<font class="kw">-&gt;</font>Write<font class="kw">(</font>5<font class="kw">,</font><font class="str">'here'</font><font class="kw">,</font>$link<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>SetFont<font class="kw">(</font><font class="str">''</font><font class="kw">);<br></font><font class="cmt">//Second page<br></font>$pdf<font class="kw">-&gt;</font>AddPage<font class="kw">();<br></font>$pdf<font class="kw">-&gt;</font>SetLink<font class="kw">(</font>$link<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>Image<font class="kw">(</font><font class="str">'logo.png'</font><font class="kw">,</font>10<font class="kw">,</font>10<font class="kw">,</font>30<font class="kw">,</font>0<font class="kw">,</font><font class="str">''</font><font class="kw">,</font><font class="str">'http://www.fpdf.org'</font><font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>SetLeftMargin<font class="kw">(</font>45<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>SetFontSize<font class="kw">(</font>14<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>WriteHTML<font class="kw">(</font>$html<font class="kw">);<br></font>$pdf<font class="kw">-&gt;</font>Output<font class="kw">();<br></font>?&gt;
16</font>
17</code></NOBR></TD></TR></TABLE><P></P>
18<SCRIPT>
19<!--
20if(document.location.href.indexOf('http:')==0)
21{
22document.write("<P CLASS='demo'><A HREF='tuto6.php' TARGET='_blank' CLASS='demo'>[Demo]</A></P>");
23}
24//-->
25</SCRIPT>
26The new method to print text is <A HREF='../doc/write.htm'>Write()</A>. It is very close to <A HREF='../doc/multicell.htm'>MultiCell()</A>; the differences
27are:
28<UL>
29<LI>The end of line is at the right margin and the next line begins at the left one
30<LI>The current position moves at the end of the text
31</UL>
32So it allows to write a chunk of text, alter the font style, then continue from the exact
33place we left it. On the other hand, you cannot full justify it.
34<BR>
35<BR>
36The method is used on the first page to put a link pointing to the second one. The beginning of
37the sentence is written in regular style, then we switch to underline and finish it. The link
38is created with <A HREF='../doc/addlink.htm'>AddLink()</A>, which returns a link identifier. The identifier is
39passed as third parameter of Write(). Once the second page is created, we use <A HREF='../doc/setlink.htm'>SetLink()</A> to
40make the link point to the beginning of the current page.
41<BR>
42<BR>
43Then we put an image with a link on it. An external link points to an URL (HTTP, mailto...).
44The URL is simply passed as last parameter of <A HREF='../doc/image.htm'>Image()</A>.
45Note that external links do not work when the PDF is displayed inside Netscape's plug-in.
46<BR>
47<BR>
48Finally, the left margin is moved after the image with <A HREF='../doc/setleftmargin.htm'>SetLeftMargin()</A> and some text in
49HTML format is output. An HTML parser is used for this, based on the regular expression splitting
50function preg_split() and the option PREG_SPLIT_DELIM_CAPTURE (introduced in PHP 4.0.5) which
51allows to fetch the separators as well (in this case the tags). If you use an older version of
52PHP, replace the line with this one:
53<BR>
54<BR>
55<TABLE WIDTH="100%" STYLE="color:#4040C0; border-style:ridge" BORDERCOLORLIGHT="#B0B0E0" BORDERCOLORDARK="#000000" BORDER="2" CELLPADDING=6 CELLSPACING=0 BGCOLOR="#F0F5FF"><TR><TD style="border-width:0px">
56<NOBR><code><font color="#000000">
57$a<font class="kw">=</font>preg_split<font class="kw">(</font><font class="str">'/[&lt;&gt;]/'</font><font class="kw">,</font>$html<font class="kw">);</font><br>
58</font>
59</code></NOBR></TD></TR></TABLE><P></P>
60which is less strict but gives the same results with valid HTML.
61<BR>
62Recognized tags are &lt;B&gt;, &lt;I&gt;, &lt;U&gt;, &lt;A&gt; and &lt;BR&gt;; the others are
63ignored. The parser also makes use of the Write() method. An external link is put the same way as
64an internal one (third parameter of Write()).
65<BR>
66Note that <A HREF='../doc/cell.htm'>Cell()</A> also allows to put links.
67</BODY>
68</HTML>
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