doctrine2/tools/sandbox/bootstrap.php

<?php

use Doctrine\Common\Cache;
use Doctrine\ORM\EntityManager;

// Path to composer autoloader. You can use different provided by your favorite framework,
// if you want to.
$loaderPath = __DIR__ . '/../../vendor/autoload.php';
if(!is_readable($loaderPath)){
    throw new LogicException('Run php composer.phar install at first');
}
$loader = require $loaderPath;

// Set up class loading.
$loader->add('Entities', __DIR__);
$loader->add('Proxies', __DIR__);

$debug = true;
$config = new \Doctrine\ORM\Configuration();

// Set up Metadata Drivers
$driverImpl = $config->newDefaultAnnotationDriver(array(__DIR__ . "/Entities"));
$config->setMetadataDriverImpl($driverImpl);

// Set up caches, depending on $debug variable.
// You can use another variable to define which one of the cache systems you gonna use.
$cache = $debug ? new Cache\ArrayCache : new Cache\ApcCache;
$config->setMetadataCacheImpl($cache);
$config->setQueryCacheImpl($cache);

// Proxy configuration
$config->setProxyDir(__DIR__ . '/Proxies');
$config->setProxyNamespace('Proxies');

// Database connection information
$connectionOptions = array(
    'driver' => 'pdo_sqlite',
    'path'   => 'database.sqlite'
);

return EntityManager::create($connectionOptions, $config);