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/application/libraries/fpdf17/tutorial/tuto6.htm

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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

    2. 

  2. <html>

    3. 

  3. <head>

    4. 

  4. <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

    5. 

  5. <title>Links and flowing text</title>

    6. 

  6. <link type="text/css" rel="stylesheet" href="../fpdf.css">

    7. 

  7. </head>

    8. 

  8. <body>

    9. 

  9. <h1>Links and flowing text</h1>

    10. 

  10. This tutorial explains how to insert links (internal and external) and shows a new text writing

    11. 

  11. mode. It also contains a basic HTML parser.

    12. 

  12. <div class="source">

    13. 

  13. <pre><code>&lt;?php

    14. 

  14. <span class="kw">require(</span><span class="str">'fpdf.php'</span><span class="kw">);

    15. 

  15. 

    16. 

  16. class </span>PDF <span class="kw">extends </span>FPDF

    17. 

  17. <span class="kw">{

    18. 

  18. var </span>$B<span class="kw">;

    19. 

  19. var </span>$I<span class="kw">;

    20. 

  20. var </span>$U<span class="kw">;

    21. 

  21. var </span>$HREF<span class="kw">;

    22. 

  22. 

    23. 

  23. function </span>PDF<span class="kw">(</span>$orientation<span class="kw">=</span><span class="str">'P'</span><span class="kw">, </span>$unit<span class="kw">=</span><span class="str">'mm'</span><span class="kw">, </span>$size<span class="kw">=</span><span class="str">'A4'</span><span class="kw">)

    24. 

  24. {

    25. 

  25.     </span><span class="cmt">// Call parent constructor

    26. 

  26.     </span>$<span class="kw">this-&gt;</span>FPDF<span class="kw">(</span>$orientation<span class="kw">,</span>$unit<span class="kw">,</span>$size<span class="kw">);

    27. 

  27.     </span><span class="cmt">// Initialization

    28. 

  28.     </span>$<span class="kw">this-&gt;</span>B <span class="kw">= </span>0<span class="kw">;

    29. 

  29.     </span>$<span class="kw">this-&gt;</span>I <span class="kw">= </span>0<span class="kw">;

    30. 

  30.     </span>$<span class="kw">this-&gt;</span>U <span class="kw">= </span>0<span class="kw">;

    31. 

  31.     </span>$<span class="kw">this-&gt;</span>HREF <span class="kw">= </span><span class="str">''</span><span class="kw">;

    32. 

  32. }

    33. 

  33. 

    34. 

  34. function </span>WriteHTML<span class="kw">(</span>$html<span class="kw">)

    35. 

  35. {

    36. 

  36.     </span><span class="cmt">// HTML parser

    37. 

  37.     </span>$html <span class="kw">= </span>str_replace<span class="kw">(</span><span class="str">"\n"</span><span class="kw">,</span><span class="str">' '</span><span class="kw">,</span>$html<span class="kw">);

    38. 

  38.     </span>$a <span class="kw">= </span>preg_split<span class="kw">(</span><span class="str">'/&lt;(.*)&gt;/U'</span><span class="kw">,</span>$html<span class="kw">,-</span>1<span class="kw">,</span>PREG_SPLIT_DELIM_CAPTURE<span class="kw">);

    39. 

  39.     foreach(</span>$a <span class="kw">as </span>$i<span class="kw">=&gt;</span>$e<span class="kw">)

    40. 

  40.     {

    41. 

  41.         if(</span>$i<span class="kw">%</span>2<span class="kw">==</span>0<span class="kw">)

    42. 

  42.         {

    43. 

  43.             </span><span class="cmt">// Text

    44. 

  44.             </span><span class="kw">if(</span>$<span class="kw">this-&gt;</span>HREF<span class="kw">)

    45. 

  45.                 </span>$<span class="kw">this-&gt;</span>PutLink<span class="kw">(</span>$<span class="kw">this-&gt;</span>HREF<span class="kw">,</span>$e<span class="kw">);

    46. 

  46.             else

    47. 

  47.                 </span>$<span class="kw">this-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span>$e<span class="kw">);

    48. 

  48.         }

    49. 

  49.         else

    50. 

  50.         {

    51. 

  51.             </span><span class="cmt">// Tag

    52. 

  52.             </span><span class="kw">if(</span>$e<span class="kw">[</span>0<span class="kw">]==</span><span class="str">'/'</span><span class="kw">)

    53. 

  53.                 </span>$<span class="kw">this-&gt;</span>CloseTag<span class="kw">(</span>strtoupper<span class="kw">(</span>substr<span class="kw">(</span>$e<span class="kw">,</span>1<span class="kw">)));

    54. 

  54.             else

    55. 

  55.             {

    56. 

  56.                 </span><span class="cmt">// Extract attributes

    57. 

  57.                 </span>$a2 <span class="kw">= </span>explode<span class="kw">(</span><span class="str">' '</span><span class="kw">,</span>$e<span class="kw">);

    58. 

  58.                 </span>$tag <span class="kw">= </span>strtoupper<span class="kw">(</span>array_shift<span class="kw">(</span>$a2<span class="kw">));

    59. 

  59.                 </span>$attr <span class="kw">= array();

    60. 

  60.                 foreach(</span>$a2 <span class="kw">as </span>$v<span class="kw">)

    61. 

  61.                 {

    62. 

  62.                     if(</span>preg_match<span class="kw">(</span><span class="str">'/([^=]*)=["\']?([^"\']*)/'</span><span class="kw">,</span>$v<span class="kw">,</span>$a3<span class="kw">))

    63. 

  63.                         </span>$attr<span class="kw">[</span>strtoupper<span class="kw">(</span>$a3<span class="kw">[</span>1<span class="kw">])] = </span>$a3<span class="kw">[</span>2<span class="kw">];

    64. 

  64.                 }

    65. 

  65.                 </span>$<span class="kw">this-&gt;</span>OpenTag<span class="kw">(</span>$tag<span class="kw">,</span>$attr<span class="kw">);

    66. 

  66.             }

    67. 

  67.         }

    68. 

  68.     }

    69. 

  69. }

    70. 

  70. 

    71. 

  71. function </span>OpenTag<span class="kw">(</span>$tag<span class="kw">, </span>$attr<span class="kw">)

    72. 

  72. {

    73. 

  73.     </span><span class="cmt">// Opening tag

    74. 

  74.     </span><span class="kw">if(</span>$tag<span class="kw">==</span><span class="str">'B' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'I' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'U'</span><span class="kw">)

    75. 

  75.         </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>true<span class="kw">);

    76. 

  76.     if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)

    77. 

  77.         </span>$<span class="kw">this-&gt;</span>HREF <span class="kw">= </span>$attr<span class="kw">[</span><span class="str">'HREF'</span><span class="kw">];

    78. 

  78.     if(</span>$tag<span class="kw">==</span><span class="str">'BR'</span><span class="kw">)

    79. 

  79.         </span>$<span class="kw">this-&gt;</span>Ln<span class="kw">(</span>5<span class="kw">);

    80. 

  80. }

    81. 

  81. 

    82. 

  82. function </span>CloseTag<span class="kw">(</span>$tag<span class="kw">)

    83. 

  83. {

    84. 

  84.     </span><span class="cmt">// Closing tag

    85. 

  85.     </span><span class="kw">if(</span>$tag<span class="kw">==</span><span class="str">'B' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'I' </span><span class="kw">|| </span>$tag<span class="kw">==</span><span class="str">'U'</span><span class="kw">)

    86. 

  86.         </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span>$tag<span class="kw">,</span>false<span class="kw">);

    87. 

  87.     if(</span>$tag<span class="kw">==</span><span class="str">'A'</span><span class="kw">)

    88. 

  88.         </span>$<span class="kw">this-&gt;</span>HREF <span class="kw">= </span><span class="str">''</span><span class="kw">;

    89. 

  89. }

    90. 

  90. 

    91. 

  91. function </span>SetStyle<span class="kw">(</span>$tag<span class="kw">, </span>$enable<span class="kw">)

    92. 

  92. {

    93. 

  93.     </span><span class="cmt">// Modify style and select corresponding font

    94. 

  94.     </span>$<span class="kw">this-&gt;</span>$tag <span class="kw">+= (</span>$enable <span class="kw">? </span>1 <span class="kw">: -</span>1<span class="kw">);

    95. 

  95.     </span>$style <span class="kw">= </span><span class="str">''</span><span class="kw">;

    96. 

  96.     foreach(array(</span><span class="str">'B'</span><span class="kw">, </span><span class="str">'I'</span><span class="kw">, </span><span class="str">'U'</span><span class="kw">) as </span>$s<span class="kw">)

    97. 

  97.     {

    98. 

  98.         if(</span>$<span class="kw">this-&gt;</span>$s<span class="kw">&gt;</span>0<span class="kw">)

    99. 

  99.             </span>$style <span class="kw">.= </span>$s<span class="kw">;

    100. 

  100.     }

    101. 

  101.     </span>$<span class="kw">this-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span>$style<span class="kw">);

    102. 

  102. }

    103. 

  103. 

    104. 

  104. function </span>PutLink<span class="kw">(</span>$URL<span class="kw">, </span>$txt<span class="kw">)

    105. 

  105. {

    106. 

  106.     </span><span class="cmt">// Put a hyperlink

    107. 

  107.     </span>$<span class="kw">this-&gt;</span>SetTextColor<span class="kw">(</span>0<span class="kw">,</span>0<span class="kw">,</span>255<span class="kw">);

    108. 

  108.     </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>true<span class="kw">);

    109. 

  109.     </span>$<span class="kw">this-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span>$txt<span class="kw">,</span>$URL<span class="kw">);

    110. 

  110.     </span>$<span class="kw">this-&gt;</span>SetStyle<span class="kw">(</span><span class="str">'U'</span><span class="kw">,</span>false<span class="kw">);

    111. 

  111.     </span>$<span class="kw">this-&gt;</span>SetTextColor<span class="kw">(</span>0<span class="kw">);

    112. 

  112. }

    113. 

  113. }

    114. 

  114. 

    115. 

  115. </span>$html <span class="kw">= </span><span class="str">'You can now easily print text mixing different styles: &lt;b&gt;bold&lt;/b&gt;, &lt;i&gt;italic&lt;/i&gt;,

    116. 

  116. &lt;u&gt;underlined&lt;/u&gt;, or &lt;b&gt;&lt;i&gt;&lt;u&gt;all at once&lt;/u&gt;&lt;/i&gt;&lt;/b&gt;!&lt;br&gt;&lt;br&gt;You can also insert links on

    117. 

  117. text, such as &lt;a href="http://www.fpdf.org"&gt;www.fpdf.org&lt;/a&gt;, or on an image: click on the logo.'</span><span class="kw">;

    118. 

  118. 

    119. 

  119. </span>$pdf <span class="kw">= new </span>PDF<span class="kw">();

    120. 

  120. </span><span class="cmt">// First page

    121. 

  121. </span>$pdf<span class="kw">-&gt;</span>AddPage<span class="kw">();

    122. 

  122. </span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">'Arial'</span><span class="kw">,</span><span class="str">''</span><span class="kw">,</span>20<span class="kw">);

    123. 

  123. </span>$pdf<span class="kw">-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span><span class="str">"To find out what's new in this tutorial, click "</span><span class="kw">);

    124. 

  124. </span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">,</span><span class="str">'U'</span><span class="kw">);

    125. 

  125. </span>$link <span class="kw">= </span>$pdf<span class="kw">-&gt;</span>AddLink<span class="kw">();

    126. 

  126. </span>$pdf<span class="kw">-&gt;</span>Write<span class="kw">(</span>5<span class="kw">,</span><span class="str">'here'</span><span class="kw">,</span>$link<span class="kw">);

    127. 

  127. </span>$pdf<span class="kw">-&gt;</span>SetFont<span class="kw">(</span><span class="str">''</span><span class="kw">);

    128. 

  128. </span><span class="cmt">// Second page

    129. 

  129. </span>$pdf<span class="kw">-&gt;</span>AddPage<span class="kw">();

    130. 

  130. </span>$pdf<span class="kw">-&gt;</span>SetLink<span class="kw">(</span>$link<span class="kw">);

    131. 

  131. </span>$pdf<span class="kw">-&gt;</span>Image<span class="kw">(</span><span class="str">'logo.png'</span><span class="kw">,</span>10<span class="kw">,</span>12<span class="kw">,</span>30<span class="kw">,</span>0<span class="kw">,</span><span class="str">''</span><span class="kw">,</span><span class="str">'http://www.fpdf.org'</span><span class="kw">);

    132. 

  132. </span>$pdf<span class="kw">-&gt;</span>SetLeftMargin<span class="kw">(</span>45<span class="kw">);

    133. 

  133. </span>$pdf<span class="kw">-&gt;</span>SetFontSize<span class="kw">(</span>14<span class="kw">);

    134. 

  134. </span>$pdf<span class="kw">-&gt;</span>WriteHTML<span class="kw">(</span>$html<span class="kw">);

    135. 

  135. </span>$pdf<span class="kw">-&gt;</span>Output<span class="kw">();

    136. 

  136. </span>?&gt;</code></pre>

    137. 

  137. </div>

    138. 

  138. <p class='demo'><a href='tuto6.php' target='_blank' class='demo'>[Demo]</a></p>

    139. 

  139. The new method to print text is <a href='../doc/write.htm'>Write()</a>. It's very close to <a href='../doc/multicell.htm'>MultiCell()</a>; the differences are:

    140. 

  140. <ul>

    141. 

  141. <li>The end of line is at the right margin and the next line begins at the left one</li>

    142. 

  142. <li>The current position moves at the end of the text</li>

    143. 

  143. </ul>

    144. 

  144. So it allows to write a chunk of text, alter the font style, then continue from the exact

    145. 

  145. place we left it. On the other hand, you cannot justify it.

    146. 

  146. <br>

    147. 

  147. <br>

    148. 

  148. The method is used on the first page to put a link pointing to the second one. The beginning of

    149. 

  149. the sentence is written in regular style, then we switch to underline and finish it. The link

    150. 

  150. is created with <a href='../doc/addlink.htm'>AddLink()</a>, which returns a link identifier. The identifier is

    151. 

  151. passed as third parameter of Write(). Once the second page is created, we use <a href='../doc/setlink.htm'>SetLink()</a> to

    152. 

  152. make the link point to the beginning of the current page.

    153. 

  153. <br>

    154. 

  154. <br>

    155. 

  155. Then we put an image with an external link on it. An external link is just a URL. It's passed as

    156. 

  156. last parameter of <a href='../doc/image.htm'>Image()</a>.

    157. 

  157. <br>

    158. 

  158. <br>

    159. 

  159. Finally, the left margin is moved after the image with <a href='../doc/setleftmargin.htm'>SetLeftMargin()</a> and some text in

    160. 

  160. HTML format is output. A very simple HTML parser is used for this, based on regular expressions.

    161. 

  161. Recognized tags are &lt;b&gt;, &lt;i&gt;, &lt;u&gt;, &lt;a&gt; and &lt;br&gt;; the others are

    162. 

  162. ignored. The parser also makes use of the Write() method. An external link is put the same way as

    163. 

  163. an internal one (third parameter of Write()). Note that <a href='../doc/cell.htm'>Cell()</a> also allows to put links.

    164. 

  164. </body>

    165. 

  165. </html>

    166. 

  166.