autoload.php

<?php

use Symfony\Component\ClassLoader\UniversalClassLoader;

$loader = new UniversalClassLoader();
$loader->registerNamespaces(array(
    'Symfony'          => array(__DIR__.'/../vendor/symfony/src', __DIR__.'/../vendor/bundles'),
    'Sensio'           => __DIR__.'/../vendor/bundles',
    'JMS'              => __DIR__.'/../vendor/bundles',
    'Doctrine\\Common' => __DIR__.'/../vendor/doctrine-common/lib',
    'Doctrine\\DBAL'   => __DIR__.'/../vendor/doctrine-dbal/lib',
    'Doctrine'         => __DIR__.'/../vendor/doctrine/lib',
    'Monolog'          => __DIR__.'/../vendor/monolog/src',
    'Assetic'          => __DIR__.'/../vendor/assetic/src',
    'Metadata'         => __DIR__.'/../vendor/metadata/src',
    'Supinfo'          => __DIR__.'/../src',
));
$loader->registerPrefixes(array(
    'Twig_Extensions_' => __DIR__.'/../vendor/twig-extensions/lib',
    'Twig_'            => __DIR__.'/../vendor/twig/lib',
));
$loader->register();
$loader->registerPrefixFallback(array(
    __DIR__.'/../vendor/symfony/src/Symfony/Component/Locale/Resources/stubs',
));

if (!function_exists('intl_is_failure')) {
    require(__DIR__.'/../vendor/symfony/src/Symfony/Component/Locale/Resources/stubs/functions.php');
}

// Swiftmailer needs a special autoloader to allow
// the lazy loading of the init file (which is expensive)
spl_autoload_register(function ($class) {
    static $initialized = false;

    $src = __DIR__.'/../vendor/swiftmailer/lib';

    if (0 === strpos($class, 'Swift_') && file_exists($path = $src.'/classes/'.str_replace('_', '/', $class).'.php')) {
        if (!$initialized) {
            $initialized = true;
            require $src.'/swift_init.php';
        }

        require $path;
    }
});