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 |
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| 代码如下 |
复制代码 |
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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);
}
}
}
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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, $args);
}
}
}
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Here are some examples of calls:
The code is as follows
| 代码如下 |
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// 增加监听walk事件
Event::listen('walk', function(){
echo "I am walking...n";
});
// 增加监听walk一次性事件
Event::listen('walk', function(){
echo "I am listening...n";
}, true);
// 触发walk事件
Event::trigger('walk');
/*
I am walking...
I am listening...
*/
Event::trigger('walk');
/*
I am walking...
*/
Event::one('say', function($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($foo, 'test'));
Event::trigger('test', 1, 2, 3);
class Bar
{
public static function foo(){
echo "Bar::foo() is calledn";
}
}
Event::listen('bar1', array('Bar', 'foo'));
Event::trigger('bar1');
Event::listen('bar2', 'Bar::foo');
Event::trigger('bar2');
function bar(){
echo "bar() is calledn";
}
Event::listen('bar3', 'bar');
Event::trigger('bar3');
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Copy code |
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//Add listening to walk event
Event::listen('walk', function(){
echo "I am walking...n";
});
// Add one-time listening event for walk
Event::listen('walk', function(){
echo "I am listening...n";
}, true);
// Trigger walk event
Event::trigger('walk');
/*
I am walking...
I am listening...
*/
Event::trigger('walk');
/*
I am walking...
*/
Event::one('say', function($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');
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http: //www.bkjia.com/PHPjc/632901.htmlThis 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...
