Some webhosts disable PHP url_fopen for security purposes. That's not a bad idea. But then you'll have to use the following code snippet instead of readfile().
User personman from the forums wrote this small code snippet. Requirement is libcurl. So it might or might not work on your webserver, depending on this requirement.
<?php $ch = curl_init(); $timeout = 5; // set to zero for no timeout curl_setopt ($ch, CURLOPT_URL, 'http://www.example.com/gallery/main.php?g2_view=imageblock.External&g2_blocks=randomImage&g2_show=title'); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $file_contents = curl_exec($ch); curl_close($ch); echo $file_contents; ?>
with your own external image block URL which can be found in Site admin -> Image Block