PHP implements event monitoring and triggering example programs_PHP tutorial

This article will introduce to you the program codes for implementing event monitoring and triggering in PHP. I hope these methods will be helpful to those in need.

I had nothing to do and thought about how to implement event monitoring in PHP. I referred to jQuery’s event binding idea and implemented it simply.
Main functions:

1. Binding events supports binding multiple actions to one event and supports binding one-time events
2. Trigger event
3. Logout event

The code is as follows

Copy code

代码如下

复制代码

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);         }     } }

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' = & gt; $ callback, 'once' = & gt; $ 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;                                                                                                                                               $event = array_shift($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);           } } }

Here are some examples of calls:

The code is as follows

代码如下

复制代码

// 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');

Copy code

//Add listening to walk event
Event::listen('walk', function(){
echo "I am walking...n";
});
// Add one-time listening event for walk
Event::listen('walk', function(){
echo "I am listening...n";
}, true);
// Trigger walk event
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'); // Output 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');

http://www.bkjia.com/PHPjc/632901.htmlwww.bkjia.comtrue

http: //www.bkjia.com/PHPjc/632901.html

TechArticle

This article will introduce to you students about the implementation of event monitoring and triggering example program code in PHP. I hope some methods will help Friends in need, please help. I have nothing to do and thought about it...