PHP 5.5 ::class feature

gistfile1.php

<?php

use A\Long\Namespace\User;
use Some\Namespace\ProductService;

// Doctrine: get entity
$user = $entityManager->find('A\Long\Namespace\User', 1234);
$user = $entityManager->find(User::class, 1234);

// Doctrine repositories
$repository = $em->getRepository('A\Long\Namespace\User');
$repository = $em->getRepository(User::class);

// Doctrine Query Builder
$qb->select('u')
   ->from('A\Long\Namespace\User', 'u')
   ->where('u.id = ?1')
   ->orderBy('u.name', 'ASC');

$qb->select('u')
   ->from(User::class, 'u')
   ->where('u.id = ?1')
   ->orderBy('u.name', 'ASC');

// DI container
$container->get('Some\Namespace\ProductService');
$container->get(ProductService::class);

// Another with DI container
$container->set('foo')
    ->bindTo('Some\Namespace\ProductService')
    ->withArguments(/* ... */);
$foo = $container->get('foo');
    
$container->set('foo')
    ->bindTo(ProductService::class)
    ->withArguments(/* ... */);
$foo = $container->get('foo');

// PHPUnit
$this->assertInstanceOf('A\Long\Namespace\User', $foo);
$this->assertInstanceOf(User::class, $foo);