Server upload

When I'm a user and I do the server upload option...I got fooled because for some reason it says youtube and stuff below so I entered a youtube address. It gave me this message...

Fatal error: Call to undefined function: strpbrk() in /home/**websiteStuff**/public_html/****websiteName****/include/classes/class.upload_remote.php on line 16

Is there anyway of not showing this because I don't want people knowing my directory structure.

For remote upload you need PHP 5 ,If you are using PHP 4, remore upload will not work,