framework/web/Request.php
public function getPort()
    {
        if ($this->_port === null) {
            $serverPort = $this->getServerPort();
            $this->_port = !$this->getIsSecureConnection() && $serverPort !== null ? $serverPort : 80;
        }

        return $this->_port;
    }
public function getPort()
    {
        if ($this->_port === null) {
            $serverPort = $this->getServerPort();
            $this->_port = !$this->getIsSecureConnection() && $serverPort !== null ? $serverPort : 80;
        }

        return $this->_port;
    }
Returns the port to use for insecure requests.
Defaults to 80, or the port specified by the server if the current
request is insecure.
@return int port number for insecure requests.
@see setPort()