当我打开php opcache时，教义被吓坏了

Question

我在教义和PHP 5.5.6 Opcache方面遇到了一个非常奇怪的问题。关闭opcache模块时一切正常。打开它后，我开始出现以下异常：

Fatal error: Uncaught exception 'DoctrineORMMappingMappingException' with message 'Class "AdminModelsUsersRole" is not a valid entity or mapped super class.' in vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php on line 336
( ! ) DoctrineORMMappingMappingException: Class "AdminModelsUsersRole" is not a valid entity or mapped super class. in vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/MappingException.php on line 336
Call Stack
#   Time    Memory  Function    Location
1   0.0000  128016  {main}( )   ../app.php:0
2   0.0185  615020  CoreBootstrap->handle( )   ../app.php:53
3   0.0210  695744  call_user_func_array ( )    ../Bootstrap.php:111
4   0.0210  695976  AdminControllersDashboardController->indexAction( )   ../Bootstrap.php:111
5   0.0210  696028  DoctrineORMEntityManager->getRepository( )    ../DashboardController.php:25
6   0.0210  696072  DoctrineORMRepositoryDefaultRepositoryFactory->getRepository( )  ../EntityManager.php:759
7   0.0210  696176  DoctrineORMRepositoryDefaultRepositoryFactory->createRepository( )   ../DefaultRepositoryFactory.php:50
8   0.0210  696200  DoctrineORMEntityManager->getClassMetadata( ) ../DefaultRepositoryFactory.php:67
9   0.0210  696420  DoctrineCommonPersistenceMappingAbstractClassMetadataFactory->getMetadataFor( ) ../EntityManager.php:295
10  0.0213  699628  DoctrineCommonPersistenceMappingAbstractClassMetadataFactory->loadMetadata( )   ../AbstractClassMetadataFactory.php:211
11  0.0224  781128  DoctrineORMMappingClassMetadataFactory->doLoadMetadata( )    ../AbstractClassMetadataFactory.php:318
12  0.0224  782824  DoctrineORMMappingDriverAnnotationDriver->loadMetadataForClass( )   ../ClassMetadataFactory.php:117

我相信我的实体定义正确 - 正如我在开头提到的，一旦我禁用 opcache，一切都按预期工作。为了初始化 Doctrine，我使用了这段代码：

// $this->getEntityPaths()   returns an array of existing absolute paths, each of which is checked with realpath().
// $this->getProxyPath()     returns a string with the absolute path, checked with realpath()
// $this->getInDevelopment() returns boolean and is set to TRUE

$config = Setup::createAnnotationMetadataConfiguration($this->getEntityPaths(), $this->getInDevelopment(), $this->getProxyPath());
$config->setAutoGenerateProxyClasses(true);
$dbParams = array(
    'driver'   => 'pdo_pgsql',
    'host'     => $this->getHost(),
    'port'     => $this->getPort(),
    'user'     => $this->getUser(),
    'password' => $this->getPass(),
    'dbname'   => $this->getName()
);
$this->db = EntityManager::create($dbParams, $config);

我也尝试过这种配置：

$config = new Configuration;
$config->setProxyDir($this->getProxyPath());
$config->setProxyNamespace('DoctrineProxies');
$config->setAutoGenerateProxyClasses(true);
$driverImpl = $config->newDefaultAnnotationDriver($this->getEntityPaths());
$config->setMetadataDriverImpl($driverImpl);
$config->setMetadataCacheImpl(new DoctrineCommonCacheArrayCache());
$config->setQueryCacheImpl(new DoctrineCommonCacheArrayCache());
// the connection configuration
$dbParams = array(
    'driver'   => 'pdo_pgsql',
    'host'     => $this->host,
    'port'     => $this->port,
    'user'     => $this->user,
    'password' => $this->pass,
    'dbname'   => $this->name
);
$this->db = EntityManager::create($dbParams, $config);

这是实体

/**
 * Roles
 *
 * @Table(name="roles")
 * @Entity
 */
class Role
{
    /**
     * @Id
     * @Column(name="role_id", type="integer", nullable=false)
     * @GeneratedValue(strategy="IDENTITY")
     */
    private $role_id;

    /**
     * @Column(name="name", type="string", length=100, nullable=false)
     */
    private $name;
}

为了简单起见，我AutoGenerateProxyClasses了，但为了确保我也通过生成代理对其进行了测试。不幸的是，我得到了同样的例外。我不确定如何解决这个问题以及问题到底是什么。是教义错误吗？为什么打开OpCache会导致Doctrine异常并且关闭它工作正常？我是否遗漏了配置部分或实体中的某些内容？

Answer 1

经过大量的调试，我终于设法理解了为什么 Doctrine 在设置 OpCache 的情况下无法正常工作。显然，默认情况下，opcache 不会存储或加载您在 php 文件中的任何注释。可以想象，这会导致任何依赖于注释的 php 库中出现大量无法解释的异常。所以只要去你的php.ini，改变下面的行，你就会像新的一样好。我想这也应该进入教义帮助。

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