This library is made simple, starting from the boss who wants an api rate limit system, but from one file/library it can be used by many projects at once.
Using this you just need to set the configuration in the config.php file then you can include this file all the projects that will use api rate limit at the very top of your php file
<?php
include_once("/var/to/universal-api-rate-limit/apiratelimit.php");
// your code