Weather station and Weather Underground -> Work around

I can’t seem to get the script to work. If I strip down the PHP file to the basics, then I can get it to post the data to WU, but when I re-insert the MQTT part, the script completely fails.

This works:

<?php

$xml = file_get_contents("http://169.63.130.180/weatherstation/updateweatherstation.php?".$_SERVER['QUERY_STRING']);

?>
success

Any ideas? Has the code changed?