phpQuery::grep PHP Method

    public static function grep($array, $callback, $invert = false)
    {
        $result = array();
        foreach ($array as $k => $v) {
            $r = call_user_func_array($callback, array($v, $k));
            if ($r === !(bool) $invert) {
                $result[] = $v;
            }
        }
        return $result;
    }