gistfile1.php

# Install it

Add to composer:

"symfony/dependency-injection": "2.4.2",
"symfony/yaml": "2.4.2",

# Configure it
<?php

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;

$container = new ContainerBuilder();
$loader = new YamlFileLoader($container, new FileLocator(__DIR__));
$loader->load('/path/to/definition.yml);

return $container;
?>

# Use it
<?php $db = $container->get("db"); ?>