42 lines
1.6 KiB
Markdown
42 lines
1.6 KiB
Markdown
|
ClassLoader Component
|
||
|
|
=====================
|
||
|
|
|
||
|
|
The ClassLoader component provides an autoloader that implements the PSR-0 standard
|
||
|
|
(which is a standard way to autoload namespaced classes as available in PHP 5.3).
|
||
|
|
It is also able to load classes that use the PEAR naming convention. It is really
|
||
|
|
flexible as it can look for classes in different directories based on a sub-namespace.
|
||
|
|
You can even give more than one directory for one namespace:
|
||
|
|
|
||
|
|
```
|
||
|
|
require_once __DIR__.'/src/Symfony/Component/ClassLoader/UniversalClassLoader.php';
|
||
|
|
|
||
|
|
use Symfony\Component\ClassLoader\UniversalClassLoader;
|
||
|
|
|
||
|
|
$loader = new UniversalClassLoader();
|
||
|
|
$loader->registerNamespaces(array(
|
||
|
|
'Symfony' => array(__DIR__.'/src', __DIR__.'/symfony/src'),
|
||
|
|
'Doctrine\\Common' => __DIR__.'/vendor/doctrine-common/lib',
|
||
|
|
'Doctrine\\DBAL' => __DIR__.'/vendor/doctrine-dbal/lib',
|
||
|
|
'Doctrine' => __DIR__.'/vendor/doctrine/lib',
|
||
|
|
'Monolog' => __DIR__.'/vendor/monolog/src',
|
||
|
|
));
|
||
|
|
$loader->registerPrefixes(array(
|
||
|
|
'Twig_' => __DIR__.'/vendor/twig/lib',
|
||
|
|
));
|
||
|
|
$loader->register();
|
||
|
|
```
|
||
|
|
|
||
|
|
Most of the time, the Symfony2 ClassLoader is all you need to autoload all your project classes.
|
||
|
|
And for better performance, you can use an APC cached version of the universal class loader or
|
||
|
|
the map class loader.
|
||
|
|
|
||
|
|
Furthermore it provides tools to aggregate classes into a single file, which is especially
|
||
|
|
useful to improve performance on servers that do not provide byte caches.
|
||
|
|
|
||
|
|
Resources
|
||
|
|
---------
|
||
|
|
|
||
|
|
Unit tests:
|
||
|
|
|
||
|
|
https://github.com/symfony/symfony/tree/master/tests/Symfony/Tests/Component/ClassLoader
|