PHP框架中的物件關係映射（ORM）：簡化資料訪問，提高開發效率

// 获取所有用户
$users = User::all();

// 获取特定用户
$user = User::find(1);

// 创建新用户
$user = new User();
$user->name = 'John Doe';
$user->email = 'john@doe.com';
$user->save();

// 更新用户
$user = User::find(1);
$user->name = 'Jane Doe';
$user->save();

// 删除用户
$user = User::find(1);
$user->delete();

// 获取实体管理器
$em = $entityManager->create();

// 获取所有用户
$users = $em->getRepository('App\Entity\User')->findAll();

// 获取特定用户
$user = $em->find('App\Entity\User', 1);

// 创建新用户
$user = new User();
$user->setName('John Doe');
$user->setEmail('john@doe.com');
$em->persist($user);
$em->flush();

// 更新用户
$user = $em->find('App\Entity\User', 1);
$user->setName('Jane Doe');
$em->flush();

// 删除用户
$em->remove($user);
$em->flush();