libraries/sanitizing.lib.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * This is in a separate script because it's called from a number of scripts
   5  *
   6  * @version $Id$
   7  * @package phpMyAdmin
   8  */
   9
  10 /**
  11  * Sanitizes $message, taking into account our special codes
  12  * for formatting
  13  *
  14  * @uses    preg_replace()
  15  * @uses    strtr()
  16  * @param   string   the message
  17  *
  18  * @return  string   the sanitized message
  19  *
  20  * @access  public
  21  */
  22 function PMA_sanitize($message)
  23 {
  24     $replace_pairs = array(
  25         '<'         => '&lt;',
  26         '>'         => '&gt;',
  27         '[i]'       => '<em>',      // deprecated by em
  28         '[/i]'      => '</em>',     // deprecated by em
  29         '[em]'      => '<em>',
  30         '[/em]'     => '</em>',
  31         '[b]'       => '<strong>',  // deprecated by strong
  32         '[/b]'      => '</strong>', // deprecated by strong
  33         '[strong]'  => '<strong>',
  34         '[/strong]' => '</strong>',
  35         '[tt]'      => '<code>',    // deprecated by CODE or KBD
  36         '[/tt]'     => '</code>',   // deprecated by CODE or KBD
  37         '[code]'    => '<code>',
  38         '[/code]'   => '</code>',
  39         '[kbd]'     => '<kbd>',
  40         '[/kbd]'    => '</kbd>',
  41         '[br]'      => '<br />',
  42         '[/a]'      => '</a>',
  43         '[sup]'      => '<sup>',
  44         '[/sup]'      => '</sup>',
  45     );
  46     $message = strtr($message, $replace_pairs);
  47
  48     $pattern = '/\[a@([^"@]*)@([^]"]*)\]/';
  49
  50     if (preg_match_all($pattern, $message, $founds, PREG_SET_ORDER)) {
  51         $valid_links = array(
  52             'http',  // default http:// links (and https://)
  53             './Do',  // ./Documentation
  54         );
  55
  56         foreach ($founds as $found) {
  57             // only http... and ./Do... allowed
  58             if (! in_array(substr($found[1], 0, 4), $valid_links)) {
  59                 return $message;
  60             }
  61             // a-z and _ allowed in target
  62             if (! empty($found[2]) && preg_match('/[^a-z_]+/i', $found[2])) {
  63                 return $message;
  64             }
  65         }
  66
  67         $message = preg_replace($pattern, '<a href="\1" target="\2">', $message);
  68     }
  69
  70     return $message;
  71 }
  72 ?>