original_string: private function checkHost(string $host): bool
      {
          return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
      }
code: private function checkHost(string $host): bool
      {
          return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
      }
code_tokens: private function checkHost ( string $ host ) : bool { return '' !== $ host && ( $ this -> checkMX ( $ host ) || ( checkdnsrr ( $ host , 'A' ) || checkdnsrr ( $ host , 'AAAA' ) ) ) ; }
docstring: Check if one of MX, A or AAAA DNS RR exists.
docstring_tokens: Check if one of MX A or AAAA DNS RR exists .