Laravel IP-based request throttling
Implementation of the Token Bucket algorithm in PHP.
StackPHP middleware for throttling HTTP requests with Predis
PHP library for traffic shaping.
Throttle for Zend / Laravel or PHP Framework
A PHP function that can be used to throttle any actions you want, as to prevent flooding.
A PHP package for throttling and rate limiting
A Guzzle 6+ Middleware that can delay requests before sending them.