getParams(); if (empty($param) || !isset($param[$this->field])) { return $this->addError('The param :attribute is null'); } $value = $param[$this->field]; if (is_null($value)) { return $this->addError('The param :attribute is null'); } if (!is_array($this->value)) { return true; } if (!in_array($value, $this->value)) { return $this->addError($this->i()); } return true; } /** * @return string */ private function i(): string { return 'The param :attribute value only in ' . implode(',', $this->value); } }