PHP include external file with specified port

I am trying to include an external PHP file in my PHP script using the include function, however as soon as I specify a port as part of the URL I get a connection timed out error.

For example:

include "http开发者_Go百科://www.url.com:8090/login.php";

As I said it works fine without the port so do I need change a PHP setting or use a different method.

Note: Using port 80 is not an option.

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if(@fsockopen("serverurl", port, $errno, $errstr, 1)){ 
    include('serverurl/file.extension');
}