調解器模式傳遞數據php

Question

class Mediator { 
    protected $events = array(); 
    public function attach($eventName, $callback) { 
     if (!isset($this->events[$eventName])) { 
      $this->events[$eventName] = array(); 
     } 
     $this->events[$eventName][] = $callback; 
    } 
    public function trigger($eventName, $data = null) { 
     foreach ($this->events[$eventName] as $callback) { 
      $callback($eventName, $data); 
     } 
    } 
} 
$mediator = new Mediator; 
$mediator->attach('stop', function() { echo "Stopping"; }); 
$mediator->attach('stop', function() { echo "Stopped"; }); 
$mediator->trigger('stop'); // prints "StoppingStopped" 

我無法弄清楚如何將數據成功傳遞到模式，即我想傳遞數據庫對象，但它最終會像這樣。

$mediator->attach('test', function($test) { echo $test; }); 
$mediator->trigger('test', '123'); 

它打印出 「測試」，而不是123

Answer 1

所有你需要的是取代：

$callback($eventName, $data); 

隨着

$callback($data); 

See Live Demo