queue = new \SplPriorityQueue; $this->timer = Loop::repeat(1000, function () { $time = \time(); while (!$this->queue->isEmpty()) { $key = $this->queue->top(); if (isset($this->expire[$key])) { if ($time <= $this->expire[$key]) { break; } unset($this->data[$key], $this->expire[$key], $this->ttl[$key]); } $this->queue->extract(); } if ($this->queue->isEmpty()) { Loop::disable($this->timer); } }); Loop::disable($this->timer); Loop::unreference($this->timer); } /** * @param string $key * * @return bool */ public function exists(string $key): bool { return isset($this->data[$key]); } /** * @param string $key * * @return mixed|null Returns null if the key does not exist. */ public function get(string $key) { if (isset($this->ttl[$key]) && 0 !== $this->ttl[$key]) { $this->expire[$key] = time() + $this->ttl[$key]; $this->queue->insert($key, -$this->expire[$key]); } return isset($this->data[$key]) ? $this->data[$key] : null; } /** * @param string $key * @param mixed $value Using null for the value deletes the key. * @param int $ttl Number of seconds until data is automatically deleted. Use 0 for unlimited TTL. */ public function set(string $key, $value, int $ttl = 0) { if (null === $value) { $this->delete($key); return; } $ttl = (int) $ttl; if (0 > $ttl) { $ttl = 0; } if (0 !== $ttl) { $this->ttl[$key] = $ttl; $this->expire[$key] = time() + $ttl; $this->queue->insert($key, -$this->expire[$key]); Loop::enable($this->timer); } else { unset($this->expire[$key], $this->ttl[$key]); } $this->data[$key] = $value; } /** * @param string $key */ public function delete(string $key) { $key = (string) $key; unset($this->data[$key], $this->expire[$key], $this->ttl[$key]); } /** * Alias of exists(). * * @param $key * * @return bool */ public function offsetExists($key) { return $this->exists($key); } /** * Alias of get(). * * @param string $key * * @return mixed */ public function offsetGet($key) { return $this->get($key); } /** * Alias of set() with $ttl = 0. * * @param string $key * @param mixed $value */ public function offsetSet($key, $value) { $this->set($key, $value); } /** * Alias of delete(). * * @param string $key */ public function offsetUnset($key) { $this->delete($key); } /** * @return int */ public function count(): int { return count($this->data); } /** * Removes all values. */ public function clear() { $this->data = []; $this->expire = []; $this->ttl = []; Loop::disable($this->timer); $this->queue = new \SplPriorityQueue(); } }