DesignPatternsPHP/Observer/User.php at master · EndlessCoding/DesignPatternsPHP · GitHub

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<?php

namespace DesignPatterns\Observer;

/**

* Observer pattern : The observed object (the subject)

* The subject maintains a list of Observers and sends notifications.

class User implements \SplSubject

{

/**

* user data

* @var array

protected $data = array();

/**

* observers

* @var array

protected $observers = array();

/**

* attach a new observer

* @param \SplObserver $observer

* @return void

public function attach(\SplObserver $observer)

{

$this->observers[] = $observer;

}

/**

* detach an observer

* @param \SplObserver $observer

* @return void

public function detach(\SplObserver $observer)

{

$index = array_search($observer, $this->observers);

if (false !== $index) {

unset($this->observers[$index]);

}

/**

* notify observers

* @return void

public function notify()

{

/** @var SplObserver $observer */

foreach ($this->observers as $observer) {

$observer->update($this);

}

/**

* Ideally one would better write setter/getter for all valid attributes and only call notify()

* on attributes that matter when changed

* @param string $name

* @param mixed $value

* @return void

public function __set($name, $value)

{

$this->data[$name] = $value;

// notify the observers, that user has been updated

$this->notify();

}

DesignPatternsPHP/Observer/User.php at master · EndlessCoding/DesignPatternsPHP · GitHub

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