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   1  <?php
   2  /**
   3   * Smarty plugin
   4   *
   5   * @package Smarty
   6   * @subpackage PluginsModifier
   7   */
   8  
   9  /**
  10   * Smarty regex_replace modifier plugin
  11   *
  12   * Type:     modifier<br>
  13   * Name:     regex_replace<br>
  14   * Purpose:  regular expression search/replace
  15   *
  16   * @link http://smarty.php.net/manual/en/language.modifier.regex.replace.php
  17   *          regex_replace (Smarty online manual)
  18   * @author Monte Ohrt <monte at ohrt dot com>
  19   * @param string       $string   input string
  20   * @param string|array $search   regular expression(s) to search for
  21   * @param string|array $replace  string(s) that should be replaced
  22   * @return string
  23   */
  24  function smarty_modifier_regex_replace($string, $search, $replace)
  25  {
  26      if(is_array($search)) {
  27          foreach($search as $idx => $s) {
  28              $search[$idx] = _smarty_regex_replace_check($s);
  29          }
  30      } else {
  31          $search = _smarty_regex_replace_check($search);
  32      }
  33      return preg_replace($search, $replace, $string);
  34  }
  35  
  36  /**
  37   * @param  string $search string(s) that should be replaced
  38   * @return string
  39   * @ignore
  40   */
  41  function _smarty_regex_replace_check($search)
  42  {
  43      // null-byte injection detection
  44      // anything behind the first null-byte is ignored
  45      if (($pos = strpos($search,"\0")) !== false) {
  46          $search = substr($search,0,$pos);
  47      }
  48      // remove eval-modifier from $search
  49      if (preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (strpos($match[1], 'e') !== false)) {
  50          $search = substr($search, 0, -strlen($match[1])) . preg_replace('![e\s]+!', '', $match[1]);
  51      }
  52      return $search;
  53  }
  54  
  55  ?>