Zend Framework 2 - Basic Components

Zend Framework 2Basic components

name:Mateusz Tymek

age: 26

job: Developer at

Who is this guy?

Zend Framework 2

Zend Framework 1 is great! Why do we need new version?

Zend Framework 2

Zend Framework 1 is great! Why do we need new version? ● ZF1 is inflexible● performance sucks● difficult to learn● doesn't use PHP 5.3 goodies

Zend Framework 2● development started in 2010● latest release is BETA3● release cycle is following the "Gmail" style of

betas● developed on GitHub● no CLA needed anymore!● aims to provide modern, fast web

framework...● ...that solves all problems with its

predecessor

ZF1 ZF2application

configscontrollersmodules views

librarypublic

configmodule

Applicationconfigsrc

ApplicationController

viewpublicvendor

New module system

"A Module is a collection of code and other files that solves a more specific atomic problem of the larger business problem"

moduleApplication

configpublicsrc

ApplicationControllerFormModelService

view

Module classclass Module implements AutoloaderProvider {

public function init(Manager $moduleManager) // module initialization {}

public function getAutoloaderConfig() // configure PSR-0 autoloader

{

return array(

'Zend\Loader\StandardAutoloader' => array(

'namespaces' => array(

'Application' => __DIR__ . '/src/Application ',

)));

}

public function getConfig() // provide module configuration

{

return include __DIR__ . '/config/module.config.php';

}

}

Module configuration

Default: modules/Doctrine/config/module.config.php return array( // connection parameters 'connection' => array( 'driver' => 'pdo_mysql', 'host' => 'localhost', 'port' => '3306', 'user' => 'username', 'password' => 'password', 'dbname' => 'database', ), // driver settings 'driver' => array( 'class' => 'Doctrine\ORM\Mapping\Driver\AnnotationDriver', 'namespace' => 'Application\Entity', ),);

User override: config/autoload/doctrine.local.config.php return array( // connection parameters 'connection' => array( 'host' => 'localhost', 'user' => 'username', 'password' => 'password', 'dbname' => 'database', ), );

Zend\EventManagerWhy do we need aspect-oriented programming?

Zend\EventManager

Define your events Zend\Module\Manager ● loadModules.pre● loadModule.resolve● loadModules.post

Zend\Mvc\Application ● bootstrap● route● dispatch● render● finish

Zend\EventManager

Attach event listeners

class Module implements AutoloaderProvider{ public function init(Manager $moduleManager) { $events = $moduleManager->events(); $sharedEvents = $events->getSharedManager();

$sharedEvents->attach( 'Zend\Mvc\Application', 'finish', function(Event $e) {

echo memory_get_usage(); });

}}

Example: blog engineclass BlogEngine { public $events;

public $blogPost;

public function __construct() { $this->events = new EventManager(__CLASS__); }

public function showBlogPost() { $this->events->trigger('render', $this); echo $this->blogPost; }}

Example: blog engineclass BlogEngine { public $events;

public $blogPost;

public function __construct() { $this->events = new EventManager(__CLASS__); }

public function showBlogPost() { $this->events->trigger('render', $this); echo $this->blogPost; }}

// ...$blogEngine->events->attach('render', function($event) { $engine = $event->getTarget(); $engine->blogPost = strip_tags($engine->blogPost); });

Dependency Injection

How do you manage your dependencies?

● globals, singletons, registry

public function indexAction() {global $application;$user = Zend_Auth::getInstance()->getIdentity();$db = Zend_Registry::get('db');

}

Dependency Injection

How do you manage your dependencies?

● Zend_Application_Bootstrap

public function _initPdo() {$pdo = new PDO(...);return $pdo;

}

public function _initTranslations() {$this->bootstrap('pdo');$pdo = $this->getResource('pdo'); // dependency!$stmt = $pdo->prepare('SELECT * FROM translations');// ...

}

Solution: Zend\Di

● First, let's consider simple service class:

class UserService {protected $pdo; public function __construct($pdo) {

$this->pdo = $pdo; }

public function fetchAll() {$stmt = $this->pdo->prepare('SELECT * FROM users');$stmt->execute();return $stmt->fetchAll();

}}

Solution: Zend\Di

● Wire it with PDO, using DI configuration:

return array( 'di' => array( 'instance' => array( 'PDO' => array( 'parameters' => array( 'dsn' => 'mysql:dbname=test;host=127.0.0.1', 'username' => 'root', 'passwd' => '' )),

'UserService' => array( 'parameters' => array( 'pdo' => 'PDO' )

)));

Solution: Zend\Di

● Use it from controllers:

public function indexAction() {

$sUsers = $this->locator->get('UserService');

$listOfUsers = $sUsers->fetchAll();

}

Definitions can be complex.return array(

'di' => array(

'instance' => array(

'Zend\View\Renderer\PhpRenderer' => array(

'parameters' => array(

'resolver' => 'Zend\View\Resolver\AggregateResolver',

),

),

'Zend\View\Resolver\AggregateResolver' => array(

'injections' => array(

'Zend\View\Resolver\TemplateMapResolver',

'Zend\View\Resolver\TemplatePathStack',

),

),

// Defining where the layout/layout view should be located

'Zend\View\Resolver\TemplateMapResolver' => array(

'parameters' => array(

'map' => array(

'layout/layout' => __DIR__ . '/../view/layout/layout.phtml',

),

),

// ...

This could go on and on...

Solution: Zend\ServiceLocator

Simplified application config:

return array( 'view_manager' => array( 'doctype' => 'HTML5', 'not_found_template' => 'error/404', 'exception_template' => 'error/index', 'template_path_stack' => array( 'application' => __DIR__ . '/../view', ), ),);

What about performance?

● PSR-0 loader

● cache where possible

● DiC

● accelerator modules:

EdpSuperluminal, ZfModuleLazyLoading

More info

● http://zendframework.com/zf2/ ● http://zend-framework-community.634137.n4.

nabble.com/ ● https://github.com/zendframework/zf2 ● http://modules.zendframework.com/ ● http://mwop.net/blog.html

Thank you!