为什么Doctrine 2的自动加载器在抛出异常时会尝试获取Exception实体？

Question

This is the relevant code:

throw new Exception("Message");

And this is the error message I get:

Fatal error: require() [function.require]: Failed opening required 'C:\wamp\www\drupal-7.15\sites\all\modules\dbManip\Entities\Exception.php' (include_path='.;C:\wamp\bin\php\php5.3.13\pear\') in C:\wamp\bin\php\php5.3.13\pear\Doctrine\Common\ClassLoader.php on line 163

I believe Doctrine is trying to load the Exception class definition as if it were just another entity of mine, but as far as I know, Exception is native to PHP (I'm using PHP 5.3.13). My theory is that I did something wrong concerning the autoloader, but I'm not sure what. Here is what I have concerning the autoloader:

use Doctrine\ORM\Tools\Setup;

require_once("Doctrine/ORM/Tools/Setup.php");
Setup::registerAutoloadPEAR();

$classloader = new Doctrine\Common\ClassLoader('Entities', __DIR__);
$classloader->register();

What am I doing wrong here? How can use throw an exception without doctrine's autoloader trying to load the Exception entity?

Answer 1

This is PHP at play. Not Doctrine.

When you declare your file in a namespace, it will use the same namespace for all classes mentioned in the file. To indicate the Exception class is from the root namespace, you must make it explicit.

throw new \Exception("Message");