Identifying filename in url

[unkwntech]

I need to identify the file name in an url, this is not the current url so I can use PHP vars, it is a string submitted from a user.

This is what I have:

/[a-Z0-9]*\.[a-Z0-9]{2,4}

what I'm looking to get is file.ext from http://domain.tld/file.ext

 

[Johntron]

basename( $url );

 

Example:

$url = 'http://www.johntron.com/index.php';
echo basename( $url );
// Output: index.php