<?PHP

function throttle($opts)
{
	if (is_array($opts) && isset($opts['id']) && isset($opts['throttled'])) {
		$now = time();
		extract($opts);
		
		
		$passes      = (isset($passes)) ? $passes : 1;
		$timeout     = (isset($timeout)) ? $timeout : 60;
		$interval    = (isset($interval)) ? $interval : 20;
		$throttleKey = (isset($throttleKey)) ? $throttleKey : $throttleKey;
		
		if (isset($_SESSION[$throttleKey][$id]['allowed'])) {
			$allowedTime = $now + ($timeout * 60);
			$timeLeft    = $now - $_SESSION[$throttleKey][$id]['allowed'];
			$secondsLeft = ($timeLeft * (-1));
			
			if ($timeLeft < 0) {
				$throttled($secondsLeft);
			} else {
				unset($_SESSION[$throttleKey][$id]);
				$_SESSION[$throttleKey][$id]['pass']  = 1;
				$_SESSION[$throttleKey][$id]['setAt'] = $now;
				
				if ($_SESSION[$throttleKey][$id]['pass'] == ($passes)) {
					$_SESSION[$throttleKey][$id]['allowed'] = $now + ($timeout);
				}
			}
		} else {
			if (!isset($_SESSION[$throttleKey][$id]['setAt'])) {
				$_SESSION[$throttleKey][$id]['setAt'] = $now;
			} else {
				if ($now > ($_SESSION[$throttleKey][$id]['setAt'] + $interval)) {
					unset($_SESSION[$throttleKey][$id]);
					$_SESSION[$throttleKey][$id]['setAt'] = $now;
					$_SESSION[$throttleKey][$id]['pass']  = 0;
				}
			}
			
			if (isset($_SESSION[$throttleKey][$id]['pass'])) {
				$_SESSION[$throttleKey][$id]['pass']++;
			} else {
				$_SESSION[$throttleKey][$id]['pass'] = 1;
			}
			
			if ($_SESSION[$throttleKey][$id]['pass'] == ($passes)) {
				$_SESSION[$throttleKey][$id]['allowed'] = $now + ($timeout);
			}
		}
	}
}