php实现事件监听与触发的方法
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2024-02-01 10:27:16
本文实例讲述了php实现事件监听与触发的方法。分享给大家供大家参考。具体分析如下:
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...
本文实例讲述了php实现事件监听与触发的方法。分享给大家供大家参考。具体分析如下:
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
复制代码 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);
}
}
}
{
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, $args);
}
}
}
以下是一些调用的例子:
复制代码 代码如下:
// 增加监听walk事件
event::listen('walk', function(){
echo "i am walking...n";
});
// 增加监听walk一次性事件
event::listen('walk', function(){
echo "i am listening...n";
}, true);
// 触发walk事件
event::trigger('walk');
/*
i am walking...
i am listening...
*/
event::trigger('walk');
/*
i am walking...
*/
event::one('say', function($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($foo, 'test'));
event::trigger('test', 1, 2, 3);
class bar
{
public static function foo(){
echo "bar::foo() is calledn";
}
}
event::listen('bar1', array('bar', 'foo'));
event::trigger('bar1');
event::listen('bar2', 'bar::foo');
event::trigger('bar2');
function bar(){
echo "bar() is calledn";
}
event::listen('bar3', 'bar');
event::trigger('bar3');
event::listen('walk', function(){
echo "i am walking...n";
});
// 增加监听walk一次性事件
event::listen('walk', function(){
echo "i am listening...n";
}, true);
// 触发walk事件
event::trigger('walk');
/*
i am walking...
i am listening...
*/
event::trigger('walk');
/*
i am walking...
*/
event::one('say', function($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。