PHP getting full server name including port number and protocol

$_SERVER['SERVER_PORT'] will give you the port currently used.

Have a look at the documentation.

You want $_SERVER['SERVER_PORT'] I think.

Here's what I use:

    function my_server_url()
    {
        $server_name = $_SERVER['SERVER_NAME'];

        if (!in_array($_SERVER['SERVER_PORT'], [80, 443])) {
            $port = ":$_SERVER[SERVER_PORT]";
        } else {
            $port = '';
        }

        if (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) == 'on' || $_SERVER['HTTPS'] == '1')) {
            $scheme = 'https';
        } else {
            $scheme = 'http';
        }
        return $scheme.'://'.$server_name.$port;
    }

The function that returns the full protocol-server-port info:

function getMyUrl()
{
  $protocol = (!empty($_SERVER['HTTPS']) && (strtolower($_SERVER['HTTPS']) == 'on' || $_SERVER['HTTPS'] == '1')) ? 'https://' : 'http://';
  $server = $_SERVER['SERVER_NAME'];
  $port = $_SERVER['SERVER_PORT'] ? ':'.$_SERVER['SERVER_PORT'] : '';
  return $protocol.$server.$port;
}