public function sendServiceCheck(string $host, string $service, int $returncode, string $message = null) : bool {
        if ('' === $service || "\0" === $service) {
            throw new \InvalidArgumentException('service can not be empty');
        }
        return $this->send($host, $service, $returncode, $message);
    }
public function sendServiceCheck(string $host, string $service, int $returncode, string $message = null) : bool {
        if ('' === $service || "\0" === $service) {
            throw new \InvalidArgumentException('service can not be empty');
        }
        return $this->send($host, $service, $returncode, $message);
    }
public function sendServiceCheck ( string $ host , string $ service , int $ returncode , string $ message = null ) : bool { if ( '' === $ service || "\0" === $ service ) { throw new \ InvalidArgumentException ( 'service can not be empty' ) ; } return $ this -> send ( $ host , $ service , $ returncode , $ message ) ; }
Sends passive service check

@param string $host
@param string $service
@param int $returncode
@param string $message
@throws \InvalidArgumentException
@throws \Exception
@return bool
Sends passive service check