SplObjserver 예제

SplObserver.php

<?php

class Channel implements Splsubject
{
    private $members;
    private $name;
    private $teller;
    private $message;

    public function __construct($name)
    {
        $this->name = $name;
        $this->members = array();
    }

    public function attach(SplObserver $player)
    {
        $this->members[] = $player;
    }

    public function detach(SplObserver $player)
    {
        $key = array_search($player, $this->members, true);
        if ($key) {
            unset($this->members[$key]);
        }
    }

    public function notify()
    {
        foreach ($this->members as $player) {
            $player->update($this);
        }
    }

    public function shout($teller, $message)
    {
        $this->teller = $teller;
        $this->message = $message;
        $this->notify();
    }

    public function teller()
    {
        return $this->teller;
    }
    
    public function message()
    {
        return $this->message;
    }
}

class Player implements Splobserver
{
    private $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function name()
    {
        return $this->name;
    }

    public function update(SplSubject $subject)
    {
        echo "{$this->name} listen to {$subject->teller()->name()}: {$subject->message()}\n";
    }
}

$channel = new Channel('Public');

$repin = new Player('Repin');
$invis = new Player('Invis');
$runestaler = new Player('Runestalker');

$channel->attach($repin);
$channel->attach($invis);
$channel->attach($runestaler);

$channel->shout($repin, 'Rok\'tar!');

?>