function __construct($obj)
{
parent::__construct($obj);
// convert the list of recognized schemes to a regex-safe string,
// where the pattern delim is a slash
$tmp = array();
$list = $this->getConf('schemes', array());
foreach ($list as $val) {
$tmp[] = preg_quote($val, '/');
}
$schemes = implode('|', $tmp);
// build the regex
$urlRegex = "(?:(?:{$schemes})" . "(?:" . "[^ \\/\"\\'{$this->wiki->delim}]*\\/" . ")*" . "[^ \\t\\n\\/\"{$this->wiki->delim}]*?)";
$this->regex = ';\\[\\[iframe\\s+(' . $urlRegex . ')(\\s+.*?)?\\]\\];si';
}
