CI_DB_driver::_has_operator PHP Method

    protected function _has_operator($str)
    {
        return (bool) preg_match('/(<|>|!|=|\\sIS NULL|\\sIS NOT NULL|\\sEXISTS|\\sBETWEEN|\\sLIKE|\\sIN\\s*\\(|\\s)/i', trim($str));
    }