PROGRAMMATION ÉVÉNEMENTIELLE EN PHP ...

<?php
/* -------------------- */
   class Delegate
   {
      private $Owner = null;
      private $MethodName = null;
      
      function __construct($owner, $method_name)
      {
         $this -> Owner = $owner;
         $this -> MethodName = $method_name;
      }
      
      function invoke($sender, $event)
      {
         $owner = $this -> Owner;
         $method_name = $this -> MethodName;
         $owner -> $method_name($sender, $event);
      }
   }
/* -------------------- */
   class Event
   {
      public $Description;
      
      function __construct($description)
      {
         $this -> Description = $description;
      }  
   }
/* -------------------- */
   class Car
   {
      public $Name = '';
      private $Started = false;
      
      public  $OverSpeed = array();
      private $Speed = 0;
      
      public function __call($method_name, $arguments)
      {
         if(substr($method_name, 0, 2) == 'on')
         {
            $event_name = substr($method_name, 2, strlen($method_name) - 2);
            if(property_exists($this, $event_name))
            {
               $listeners = $this -> $event_name;
               foreach($listeners as $listener)
               {
                  $listener -> invoke($arguments[0], $arguments[1]);
               }
            }   
         }
      }
      
      public function __construct($name)
      {
         $this -> Name = $name;
      }
      
      public function accelerate()
      {
         if($this -> Started)
         {
            $speed = &$this -> Speed;
            $speed += 10;
            if($speed > 50) $this -> onOverSpeed($this, new Event("Excès de vitesse"));
         }
         else echo 'Démarre la voiture avant d\'accélerer ! <br />';
      }
      
      public function start()
      {
         $this -> Started = true;
      }
      
      public function stop()
      {
         $this -> Started = false;
      }
   }
/* -------------------- */
   class PoliceOfficier
   {
      private $Matricule = null;
      
      function __construct($matricule)
      {
         $this -> Matricule = $matricule;
      }
      
      public function charge($sender, $event)
      {
         echo 'Ici l\'agent '.($this -> Matricule).'. Je dresse un procés verbal contre le conducteur de la '.($sender -> Name).' pour cause de '.strtolower($event -> Description).'. <br />';
         $sender -> stop();
         echo 'J\'ai arrêté l\'automobiliste ! Il est aussi complêtement bourré ! <br />';
      }
   }
/* -------------------- */
   $john = new PoliceOfficier('3845-5214');
   $porche = new Car('Porche');
   $porche -> OverSpeed[] = new Delegate($john, 'charge');
   $porche -> start();
   $porche -> accelerate();
   $porche -> accelerate();
   $porche -> accelerate();
   $porche -> accelerate();
   $porche -> accelerate();
   $porche -> accelerate();
   $porche -> accelerate();
/* -------------------- */
?>