PMA\libraries\Sanitize::replaceBBLink PHP Метод

    public static function replaceBBLink($found)
    {
        /* Check for valid link */
        if (!Sanitize::checkLink($found[1])) {
            return $found[0];
        }
        /* a-z and _ allowed in target */
        if (!empty($found[3]) && preg_match('/[^a-z_]+/i', $found[3])) {
            return $found[0];
        }
        /* Construct target */
        $target = '';
        if (!empty($found[3])) {
            $target = ' target="' . $found[3] . '"';
            if ($found[3] == '_blank') {
                $target .= ' rel="noopener noreferrer"';
            }
        }
        /* Construct url */
        if (substr($found[1], 0, 4) == 'http') {
            $url = PMA_linkURL($found[1]);
        } else {
            $url = $found[1];
        }
        return '<a href="' . $url . '"' . $target . '>';
    }

 /**
  * Sanitizes $message, taking into account our special codes
  * for formatting.
  *
  * If you want to include result in element attribute, you should escape it.
  *
  * Examples:
  *
  * <p><?php echo Sanitize::sanitize($foo); ?></p>
  *
  * <a title="<?php echo Sanitize::sanitize($foo, true); ?>">bar</a>
  *
  * @param string  $message the message
  * @param boolean $escape  whether to escape html in result
  * @param boolean $safe    whether string is safe (can keep < and > chars)
  *
  * @return string   the sanitized message
  */
 public static function sanitize($message, $escape = false, $safe = false)
 {
     if (!$safe) {
         $message = strtr($message, array('<' => '&lt;', '>' => '&gt;'));
     }
     /* Interpret bb code */
     $replace_pairs = array('[em]' => '<em>', '[/em]' => '</em>', '[strong]' => '<strong>', '[/strong]' => '</strong>', '[code]' => '<code>', '[/code]' => '</code>', '[kbd]' => '<kbd>', '[/kbd]' => '</kbd>', '[br]' => '<br />', '[/a]' => '</a>', '[/doc]' => '</a>', '[sup]' => '<sup>', '[/sup]' => '</sup>', '[conferr]' => '<iframe src="show_config_errors.php"><a href="show_config_errors.php">show_config_errors.php</a></iframe>', '[dochelpicon]' => Util::getImage('b_help.png', __('Documentation')));
     $message = strtr($message, $replace_pairs);
     /* Match links in bb code ([a@url@target], where @target is options) */
     $pattern = '/\\[a@([^]"@]*)(@([^]"]*))?\\]/';
     /* Find and replace all links */
     $message = preg_replace_callback($pattern, function ($match) {
         return Sanitize::replaceBBLink($match);
     }, $message);
     /* Replace documentation links */
     $message = preg_replace_callback('/\\[doc@([a-zA-Z0-9_-]+)(@([a-zA-Z0-9_-]*))?\\]/', function ($match) {
         return Sanitize::replaceDocLink($match);
     }, $message);
     /* Possibly escape result */
     if ($escape) {
         $message = htmlspecialchars($message);
     }
     return $message;
 }