The other day I upgraded my dev box to php 5.3.6, (from 5.2.x), and I got frustrated because I could not get php_mycrypt.dll to load. The reason is simply because it is bundled in php 5.3.x, (for windows at least). I suspect it is also built in with the unix versions as well.
How to enable mcrypt/libmcrypt for PHP on a windows webserver. Also explain how to create a phpinfo file to get the website values.