PHP 5.4.9未定义的类常量'；MYSQL_ATTR_INIT_命令'；

我试图通过以下教程和运行该命令来配置条令： ./vendor/bin/doctrine模块orm:validate schema I出现错误：

第19行var/www/CommunicationApp/config/autoload/global.php中未定义的类常量“MYSQL\u ATTR\u INIT\u COMMAND”

以下是global.php文件：

<?php
/**
 * Global Configuration Override
 *
 * You can use this file for overriding configuration values from modules, etc.
 * You would place values in here that are agnostic to the environment and not
 * sensitive to security.
 *
 * @NOTE: In practice, this file will typically be INCLUDED in your source
 * control, so do not include passwords or other sensitive information in this
 * file.
 */

return array(
  'db' => array(
     'driver'  => 'Pdo',
     'dsn'   => 'mysql:dbname=zf2tutorial;host=localhost',
     'driver_options' => array(
         PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
     ),
 ),
 'service_manager' => array(
     'factories' => array(
         'Zend\Db\Adapter\Adapter'
                 => 'Zend\Db\Adapter\AdapterServiceFactory',
     ),
 ),
);

---

确保安装了PHP MySQL扩展。在Ubuntu上，这将是：

sudo apt-get install php5-mysql

我在这个PDO行中遇到了同样的问题，然后首先，我安装了Tim Fountain发布的php5 mysql包。第二步是从线路上移除逃生通道

'driver_options' => array(
     PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'UTF8'"
 ),

在这两件事之后，它成功了
 尝试将其命名为“根”命名空间：
\PDO:：MYSQL_ATTR_INIT_COMMAND
（PDO之前的反斜杠）它不起作用，相同的错误检查此答案：现在我遇到此错误：[doctor\Common\Persistence\Mapping\MappingException]文件映射驱动程序必须具有有效的目录路径，但是，给定的路径[/var/www/CommunicationApp/module/CsnFileManager/config/。/src/CsnFileMa-manager/Entity]似乎不正确！