original_string: public function err($message, $code = -1, $level = 'info')
      {
          return $this->ret->err($message, $code, $level);
      }
code: public function err($message, $code = -1, $level = 'info')
      {
          return $this->ret->err($message, $code, $level);
      }
code_tokens: public function err ( $ message , $ code = - 1 , $ level = 'info' ) { return $ this -> ret -> err ( $ message , $ code , $ level ) ; }
docstring: Return operation failed result, and logs with an info level
  
  @param string|array $message
  @param int $code
  @param string $level
  @return array
docstring_tokens: Return operation failed result and logs with an info level