<?php
 
// it's for show result in ideone
$stdout = fopen('php://stdout', 'w');
 
function url_relative_to_absolute($baseUrl, $relativeUrl, $removeGet=true) {
   $url = rtrim($baseUrl, '/').'/'.ltrim($relativeUrl, '/');
   if($removeGet)
      $url = strtok($url, '?');
   return $url;
}
 
$res = url_relative_to_absolute(
	'http://e...content-available-to-author-only...e.com', 
	'/upload/produse/Blu-ray/BD-H6500.jpg?maxwidth=800&maxheight=800'
);
 
// it's for show result in ideone
fwrite($stdout, $res);

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