Original Project Page
Original Google Code Page
TimThumb is a simple, flexible, PHP script that resizes and caches images. You give it a bunch of parameters, and it spits out a thumbnail image that you can display on your site.
The script was changed from the original to work with PHP7.
HTML example:
<img src="/scripts/timthumb.php?src=/images/whatever.jpg&w=150&h=200&zc=1" alt="" />