A simple way to find those html web pages that are the same but the code isn't 100% the same. Its using php and mysql for fast and accurate findings.
Mysqli is a great addon to php, however its prepared statements are very trivial. So wrote a wrapper to provide a simple api without reverting to PDO for loss of speed.
There are plenty of reasons not to use RAND(), so I go over a few methods and when to really use RAND().