| ApcUniversalClassLoader | ApcUniversalClassLoader implements a "universal" autoloader cached in APC for PHP 5.3. |
| ClassCollectionLoader | ClassCollectionLoader. |
| DebugUniversalClassLoader | Checks that the class is actually declared in the included file. |
| MapClassLoader | A class loader that uses a mapping file to look up paths. |
| UniversalClassLoader | UniversalClassLoader implements a "universal" autoloader for PHP 5.3. |