inanzzz | Setting dynamic values to keys in config.yml

Normally we set a value against a key in config.yml file and it always stays the same because it is a static file. However, you can set a different value against a key in config.yml file as shown below. This example sets a dynamic value for namespace key in kernel level.

Config.yml

doctrine_cache:
    providers:
        my_memcached_cache:
            #namespace: my_namespace_123 # This would be useless if we wanted a dynamic value
            memcached:
                servers:
                    memcached01:
                        host: %memcache_server%
                        port: %memcache_port%

DependencyInjection

namespace Application\FrontendBundle\DependencyInjection;

class ApplicationFrontendExtension extends Extension implements PrependExtensionInterface
{
    # ...
    # ...

    public function prepend(ContainerBuilder $container)
    {
        $container->prependExtensionConfig(
            'doctrine_cache',
            [
                'providers' => [
                    'my_memcached_cache' => [
                        'namespace' => sprintf('fws_validation_cache_namespace_%s', time()),
                        'type' => 'array',
                    ],
                ],
            ]
        );
    }

    # ...
    # ...
}