php实现事件监听与触发实例程序
闲来无事,想了想PHP如何实现事件监听,参考了jQuery的事件绑定思路,简单的实现了一下.
主要功能:1.绑定事件 支持一个事件绑定多个动作,支持绑定一次性事件,2.触发事件,3.注销事件
php实现事件监听与触发实例程序,代码如下:
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 ); } } } 以下是一些调用的例子: // 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' ); //开源代码phpfensi.com Event::listen( 'bar2' , 'Bar::foo' ); Event::trigger( 'bar2' ); function bar(){ echo "bar() is calledn" ; } Event::listen( 'bar3' , 'bar' ); Event::trigger( 'bar3' );查看更多关于php实现事件监听与触发实例程序 - php高级应用的详细内容...
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