2.触发事件
3.注销事件
class Event { protected static $listens = array(); public static function listen($event, $callback, $once=false){ if(!is_callable($callback)) return false; self::$listens[$event][] = array('callback'=>$callback, 'once'=>$once); return true; } public static function one($event, $callback){ return self::listen($event, $callback, true); } public static function remove($event, $index=null){ if(is_null($index)) unset(self::$listens[$event]); else unset(self::$listens[$event][$index]); } public static function trigger(){ if(!func_num_args()) return; $args = func_get_args(); $event = array_shift($args); if(!isset(self::$listens[$event])) return false; foreach((array) self::$listens[$event] as $index=>$listen){ $callback = $listen['callback']; $listen['once'] && self::remove($event, $index); call_user_func_array($callback, $args); } } }
// 增加监听walk事件 Event::listen('walk', function(){ echo "I am walking...n"; }); // 增加监听walk一次性事件 Event::listen('walk', function(){ echo "I am listening...n"; }, true); // 触发walk事件 Event::trigger('walk'); /* I am walking... I am listening... */ Event::trigger('walk'); /* I am walking... */ Event::one('say', function($name=''){ echo "I am {$name}n"; }); Event::trigger('say', 'deeka'); // 输出 I am deeka Event::trigger('say', 'deeka'); // not run class Foo { public function bar(){ echo "Foo::bar() is calledn"; } public function test(){ echo "Foo::foo() is called, agrs:".json_encode(func_get_args())."n"; } } $foo = new Foo; Event::listen('bar', array($foo, 'bar')); Event::trigger('bar'); Event::listen('test', array($foo, 'test')); Event::trigger('test', 1, 2, 3); class Bar { public static function foo(){ echo "Bar::foo() is calledn"; } } Event::listen('bar1', array('Bar', 'foo')); Event::trigger('bar1'); Event::listen('bar2', 'Bar::foo'); Event::trigger('bar2'); function bar(){ echo "bar() is calledn"; } Event::listen('bar3', 'bar'); Event::trigger('bar3');
希望本文所述对大家的PHP程序设计有所帮助。