Error: Allowed to open external URLs (red)

[Tiestarian]

I know there's a lot of threads talking about this already, but I couldn't find a solution.

Am I correct in thinking to fix this error I should just need the following to be enabled in php.ini?

allow_url_fopen = On

I've enabled that, and the actual function seems to be working... but PrestaShop still doesn't pick it up.

I made a quick test file (assuming this is a sufficient test, but maybe not).

<?php

$handle = fopen("http://www.ben-thomas.org/random.txt", "r");

if($handle){
   echo $handle;
}else{
   echo "hmm, seems to be disabled =(";
}

?>

That outputs:
Resource id #2

Any ideas?