How to remove last part of url in PHP

There is no need to use explode, implode, and array_pop.

Just use dirname($path). It's a lot more efficient and cleaner code.

Try this:

$url = explode('/', 'http://www.brightknowledge.org/knowledge-bank/media/studying-media/student-media/image_rhcol_thin');
array_pop($url);
echo implode('/', $url);