<?php

class RequestThrottler {

private $request_queue = [];

private $limit;

private $time_window;

public function __construct(int $limit, int $time_window) {

$this->limit = $limit;

$this->time_window = $time_window;

}

public function isAllowed(string $request): bool {

$now = time();

// Remove expired requests from the queue

$this->removeExpiredRequests($now);

// Check if the queue is full

if (count($this->request_queue) >= $this->limit) {

return false; // Throttled

}

// Add the request to the queue

$this->request_queue[] = $request;

return true; // Allowed

}

private function removeExpiredRequests(int $now): void {

$this->request_queue = array_filter($this->request_queue, function ($request) use ($now) {

$request_time = time();

return ($now - $request_time) < $this->time_window;

});

}

public function getQueueSize(): int {

return count($this->request_queue);

}

}

?>