事件管理一直是js之类的语言的法宝,事件注册和调用过程中能减少代码的复杂程度,evenement是基于php5.4特性写的一个时间管理程序。
namespace Evenement; trait EventEmitterTrait { protected $listeners = []; public function on($event, callable $listener) { if (!isset($this->listeners[$event])) { $this->listeners[$event] = []; } $this->listeners[$event][] = $listener; } public function once($event, callable $listener) { $onceListener = function () use (&$onceListener, $event, $listener) { $this->removeListener($event, $onceListener); call_user_func_array($listener, func_get_args()); }; $this->on($event, $onceListener); } public function removeListener($event, callable $listener) { if (isset($this->listeners[$event])) { $index = array_search($listener, $this->listeners[$event], true); if (false !== $index) { unset($this->listeners[$event][$index]); } } } public function removeAllListeners($event = null) { if ($event !== null) { unset($this->listeners[$event]); } else { $this->listeners = []; } } public function listeners($event) { return isset($this->listeners[$event]) ? $this->listeners[$event] : []; } public function emit($event, array $arguments = []) { foreach ($this->listeners($event) as $listener) { call_user_func_array($listener, $arguments); } } }
{ "require": { "evenement/evenement": "2.0.*" } }一个调用实例
require 'vendor/autoload.php'; $emitter = new Evenement\EventEmitter(); $emitter->on('user.created', function (User $user) use ($logger) { $logger->log(sprintf("User '%s' was created.", $user->getLogin())); }); $emitter->emit('user.created', array($user));