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php实现事件

关键词: php event

php实现事件

`event.php`文件内容如下

```
<?php
namespace Dry\Base;

class Event{

private $data = array();

public function listen($event, $callback, $once = false)
    {
        if(is_callable($callback)){
            $this->data[$event][] = array('callback' => $callback, 'once' => $once);
        }
    }

public function one($event, $callback)
    {
        $this->listen($event, $callback, true);
    }

public function remove($event, $index = null)
    {
        if(is_null($index)){
            unset($this->data[$event]);
        }
        else{
            unset($this->data[$event][$index]);
        }
    }

public function trigger($event, $data = null)
    {
        if(isset($this->data[$event])){
            $list = $this->data[$event];
            foreach($list as $index => $listen){
                $callback = $listen['callback'];
                if($listen['once']){
                    $this->remove($event, $index);
                }
                if(is_null($data)){
                    call_user_func($callback);
                }
                else{
                    call_user_func($callback, $data);
                }
            }
        }
    }

}
?>
```

`test.php`文件内容如下(测试)

```
<?php
require_once('event.php');

use Dry\Base\Event;

$handle = new Event();

/*
function test1()
{
    echo 'this is test1<br>';
}
$handle->listen('name1', 'test1');
$handle->trigger('name1');
$handle->trigger('name1');
*/

/*
function test2($data)
{
    echo $data.'<br>';
}
$handle->listen('name2', 'test2');
$handle->trigger('name2', 'this is test2');
$handle->trigger('name2', 'this is test2');
*/

/*
function test3($data)
{
    echo $data.'<br>';
}
$handle->one('name3', 'test3');
$handle->trigger('name3', 'this is test3');
$handle->trigger('name3', 'this is test3');
*/

/*
class a
{
    public function b($data)
    {
        echo $data.'<br>';
    }
}
$handle->listen('name4', 'a::b');
$handle->trigger('name4', 'this is test4');
$handle->listen('name5', array('a', 'b'));
$handle->trigger('name5', 'this is test5');
*/
?>
```

admin
2017-06-23 15:40:17
php

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php实现事件