params) || !isset($this->params[$this->field])) { return true; } if (preg_match('/^[a-zA-Z0-9]+([\.\_]{1,})[a-zA-Z0-9]+@[a-zA-Z]+(\.\w+)+/', $this->params[$this->field])) { return true; } else { return $this->addError('The param :attribute format error'); } } }