private function setPort($port = null)
	{
		if ($port !== null && (1 > $port || 0xffff < $port)) {
			throw new \InvalidArgumentException('Invalid port');
		}

		$this->port = $port;

		return $this;
	}
private function setPort($port = null)
	{
		if ($port !== null && (1 > $port || 0xffff < $port)) {
			throw new \InvalidArgumentException('Invalid port');
		}

		$this->port = $port;

		return $this;
	}
private function setPort ( $ port = null ) { if ( $ port !== null && ( 1 > $ port || 0xffff < $ port ) ) { throw new \ InvalidArgumentException ( 'Invalid port' ) ; } $ this -> port = $ port ; return $ this ; }
Set the port.

@param int|null $port
@return $this
@throws \InvalidArgumentException
Set the port .