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‎Behavioral/Memento/Caretaker.php‎

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<?php
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namespace DesignPatterns\Behavioral\Memento;
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class Caretaker
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{
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public static function run()
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{
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/* @var $savedStates Memento[] */
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$savedStates = array();
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$originator = new Originator();
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//Setting state to State1
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$originator->setState("State1");
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//Setting state to State2
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$originator->setState("State2");
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//Saving State2 to Memento
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$savedStates[] = $originator->saveToMemento();
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//Setting state to State3
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$originator->setState("State3");
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// We can request multiple mementos, and choose which one to roll back to.
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// Saving State3 to Memento
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$savedStates[] = $originator->saveToMemento();
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//Setting state to State4
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$originator->setState("State4");
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$originator->restoreFromMemento($savedStates[1]);
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//State after restoring from Memento: State3
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}
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}

‎Behavioral/Memento/Memento.php‎

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<?php
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namespace DesignPatterns\Behavioral\Memento;
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class Memento
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{
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/* @var mixed */
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private $state;
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/**
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* @param mixed $stateToSave
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*/
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public function __construct($stateToSave)
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{
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$this->state = $stateToSave;
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}
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/**
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* @return mixed
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*/
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public function getState()
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{
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return $this->state;
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}
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}

‎Behavioral/Memento/MementoTest.php‎

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<?php
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namespace DesignPatterns\Behavioral\Memento;
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/**
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* MementoTest tests the memento pattern
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*/
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class MementoTest extends \PHPUnit_Framework_TestCase
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{
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public function testStringState()
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{
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$originator = new Originator();
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$originator->setState("State1");
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$this->assertAttributeEquals("State1", "state", $originator);
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$originator->setState("State2");
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$this->assertAttributeEquals("State2", "state", $originator);
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$savedState = $originator->saveToMemento();
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$this->assertAttributeEquals("State2", "state", $savedState);
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$originator->setState("State3");
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$this->assertAttributeEquals("State3", "state", $originator);
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$originator->restoreFromMemento($savedState);
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$this->assertAttributeEquals("State2", "state", $originator);
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}
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public function testObjectState()
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{
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$originator = new Originator();
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$foo = new \stdClass();
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$foo->data = "foo";
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$originator->setState($foo);
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$this->assertAttributeEquals($foo, "state", $originator);
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$savedState = $originator->saveToMemento();
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$this->assertAttributeEquals($foo, "state", $savedState);
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$bar = new \stdClass();
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$bar->data = "bar";
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$originator->setState($bar);
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$this->assertAttributeEquals($bar, "state", $originator);
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$originator->restoreFromMemento($savedState);
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$this->assertAttributeEquals($foo, "state", $originator);
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$foo->data = null;
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$this->assertAttributeNotEquals($foo, "state", $savedState);
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$this->assertAttributeNotEquals($foo, "state", $originator);
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}
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}

‎Behavioral/Memento/Originator.php‎

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<?php
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namespace DesignPatterns\Behavioral\Memento;
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class Originator
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{
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/* @var mixed */
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private $state;
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// The class could also contain additional data that is not part of the
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// state saved in the memento..
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/**
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* @param mixed $state
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*/
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public function setState($state)
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{
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$this->state = $state;
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}
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/**
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* @return Memento
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*/
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public function saveToMemento()
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{
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$state = is_object($this->state) ? clone $this->state : $this->state;
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return new Memento($state);
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}
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public function restoreFromMemento(Memento $memento)
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{
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$this->state = $memento->getState();
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}
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}

‎Behavioral/Memento/README.md‎

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# Memento
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## Purpose
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Provide the ability to restore an object to its previous state (undo via rollback).
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The memento pattern is implemented with three objects: the originator, a caretaker and a memento.
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The originator is some object that has an internal state.
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The caretaker is going to do something to the originator, but wants to be able to undo the change.
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The caretaker first asks the originator for a memento object. Then it does whatever operation (or sequence of operations) it was going to do.
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To roll back to the state before the operations, it returns the memento object to the originator.
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The memento object itself is an opaque object (one which the caretaker cannot, or should not, change).
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When using this pattern, care should be taken if the originator may change other objects or resources - the memento pattern operates on a single object.
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## Examples
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* The seed of a pseudorandom number generator
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* The state in a finite state machine

‎More/ServiceLocator/ServiceLocatorTest.php‎

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public function setUp()
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{
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$this->serviceLocator = new ServiceLocator();
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$this->logService = new LogService();
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$this->serviceLocator = new ServiceLocator();
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$this->logService = new LogService();
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$this->databaseService = new DatabaseService();
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}
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public function testHasServices()
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{
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$this->serviceLocator->add(
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'DesignPatterns\More\ServiceLocator\LogServiceInterface',
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$this->logService
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);
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$this->serviceLocator->add(
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'DesignPatterns\More\ServiceLocator\DatabaseServiceInterface',
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$this->databaseService
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);
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$this->serviceLocator->add('DesignPatterns\More\ServiceLocator\LogServiceInterface', $this->logService);
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$this->serviceLocator->add('DesignPatterns\More\ServiceLocator\DatabaseServiceInterface', $this->databaseService);
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$this->assertTrue($this->serviceLocator->has('DesignPatterns\More\ServiceLocator\LogServiceInterface'));
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$this->assertTrue($this->serviceLocator->has('DesignPatterns\More\ServiceLocator\DatabaseServiceInterface'));

‎README.md‎

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* [AbstractFactory](Creational/AbstractFactory) [:notebook:](http://en.wikipedia.org/wiki/Abstract_factory_pattern)
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* [Builder](Creational/Builder) [:notebook:](http://en.wikipedia.org/wiki/Builder_pattern)
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* [SimpleFactory](Creational/SimpleFactory)
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* [FactoryMethod](Creational/FactoryMethod) [:notebook:](http://en.wikipedia.org/wiki/Factory_method_pattern)
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* [StaticFactory](Creational/StaticFactory)
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* [Prototype](Creational/Prototype) [:notebook:](http://en.wikipedia.org/wiki/Prototype_pattern)
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* [Multiton](Creational/Multiton) (is considered an anti-pattern! :no_entry:)
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* [Pool](Creational/Pool) [:notebook:](http://en.wikipedia.org/wiki/Object_pool_pattern)
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* [Prototype](Creational/Prototype) [:notebook:](http://en.wikipedia.org/wiki/Prototype_pattern)
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* [SimpleFactory](Creational/SimpleFactory)
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* [Singleton](Creational/Singleton) [:notebook:](http://en.wikipedia.org/wiki/Singleton_pattern) (is considered an anti-pattern! :no_entry:)
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* [Multiton](Creational/Multiton) (is considered an anti-pattern! :no_entry:)
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* [StaticFactory](Creational/StaticFactory)
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### [Structural](Structural)
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* [Adapter](Structural/Adapter) [:notebook:](http://en.wikipedia.org/wiki/Adapter_pattern)
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* [Bridge](Structural/Bridge) [:notebook:](http://en.wikipedia.org/wiki/Bridge_pattern)
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* [Composite](Structural/Composite) [:notebook:](http://en.wikipedia.org/wiki/Composite_pattern)
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* [DataMapper](Structural/DataMapper) [:notebook:](http://en.wikipedia.org/wiki/Data_mapper_pattern)
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* [Decorator](Structural/Decorator) [:notebook:](http://en.wikipedia.org/wiki/Decorator_pattern)
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* [Command](Behavioral/Command) [:notebook:](http://en.wikipedia.org/wiki/Command_pattern)
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* [Iterator](Behavioral/Iterator) [:notebook:](http://en.wikipedia.org/wiki/Iterator_pattern)
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* [Mediator](Behavioral/Mediator) [:notebook:](http://en.wikipedia.org/wiki/Mediator_pattern)
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* [Memento](Memento) [:notebook:](http://en.wikipedia.org/wiki/Memento_pattern)
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* [NullObject](Behavioral/NullObject) [:notebook:](http://en.wikipedia.org/wiki/Null_Object_pattern)
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* [Observer](Behavioral/Observer) [:notebook:](http://en.wikipedia.org/wiki/Observer_pattern)
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* [Specification](Behavioral/Specification) [:notebook:](http://en.wikipedia.org/wiki/Specification_pattern)
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(The MIT License)
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Copyright (c) 2013 Dominik Liebler
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Copyright (c) 2014 Dominik Liebler
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the

‎Structural/Bridge/Assemble.php‎

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<?php
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namespace DesignPatterns\Structural\Bridge;
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class Assemble implements Workshop
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{
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public function work()
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{
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print 'Assembled';
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}
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}

‎Structural/Bridge/BridgeTest.php‎

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<?php
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namespace DesignPatterns\Structural\Bridge;
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class BridgeTest extends \PHPUnit_Framework_TestCase
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{
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public function testCar()
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{
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$vehicle = new Car(new Produce(), new Assemble());
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$this->expectOutputString('Car Produced Assembled');
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$vehicle->manufacture();
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}
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public function testMotorcycle()
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{
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$vehicle = new Motorcycle(new Produce(), new Assemble());
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$this->expectOutputString('Motorcycle Produced Assembled');
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$vehicle->manufacture();
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}
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}

‎Structural/Bridge/Car.php‎

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<?php
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namespace DesignPatterns\Structural\Bridge;
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/**
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* Refined Abstraction
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*/
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class Car extends Vehicle
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{
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public function __construct(Workshop $workShop1, Workshop $workShop2)
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{
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parent::__construct($workShop1, $workShop2);
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}
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public function manufacture()
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{
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print 'Car ';
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$this->workShop1->work();
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$this->workShop2->work();
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}
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}

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