libraries/sanitizing.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  *
   5  * @version $Id$
   6  */
   7
   8 /**
   9  * Sanitizes $message, taking into account our special codes
  10  * for formatting
  11  *
  12  * @uses    preg_replace()
  13  * @uses    strtr()
  14  * @param   string   the message
  15  *
  16  * @return  string   the sanitized message
  17  *
  18  * @access  public
  19  */
  20 function PMA_sanitize($message)
  21 {
  22     $replace_pairs = array(
  23         '<'         => '&lt;',
  24         '>'         => '&gt;',
  25         '[i]'       => '<em>',      // deprecated by em
  26         '[/i]'      => '</em>',     // deprecated by em
  27         '[em]'      => '<em>',
  28         '[/em]'     => '</em>',
  29         '[b]'       => '<strong>',  // deprecated by strong
  30         '[/b]'      => '</strong>', // deprecated by strong
  31         '[strong]'  => '<strong>',
  32         '[/strong]' => '</strong>',
  33         '[tt]'      => '<code>',    // deprecated by CODE or KBD
  34         '[/tt]'     => '</code>',   // deprecated by CODE or KBD
  35         '[code]'    => '<code>',
  36         '[/code]'   => '</code>',
  37         '[kbd]'     => '<kbd>',
  38         '[/kbd]'    => '</kbd>',
  39         '[br]'      => '<br />',
  40         '[/a]'      => '</a>',
  41         '[sup]'      => '<sup>',
  42         '[/sup]'      => '</sup>',
  43     );
  44     $message = strtr($message, $replace_pairs);
  45
  46     $pattern = '/\[a@([^"@]*)@([^]"]*)\]/';
  47
  48     if (preg_match_all($pattern, $message, $founds, PREG_SET_ORDER)) {
  49         $valid_links = array(
  50             'http',  // default http:// links (and https://)
  51             './Do',  // ./Documentation
  52         );
  53
  54         foreach ($founds as $found) {
  55             // only http... and ./Do... allowed
  56             if (! in_array(substr($found[1], 0, 4), $valid_links)) {
  57                 return $message;
  58             }
  59             // a-z and _ allowed in target
  60             if (! empty($found[2]) && preg_match('/[^a-z_]+/i', $found[2])) {
  61                 return $message;
  62             }
  63         }
  64
  65         $message = preg_replace($pattern, '<a href="\1" target="\2">', $message);
  66     }
  67
  68     return $message;
  69 }
  70 ?>