symfony: [DI] Unable to resolve env()

Q	A
Bug report?	yes
Feature request?	no
BC Break report?	no
RFC?	no
Symfony version	3.2.2

Hi,

I’m trying to use the new env() placeholder introduced with https://github.com/symfony/symfony/pull/19681, but I can’t get it to work. I installed symfony/dependency-injection|config|yaml, and I followed Setting up the Container with Configuration Files.

This is my script—mostly copy/pasted from the documentation:

<?php

require __DIR__ . '/vendor/autoload.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('services.yml');

var_dump(getenv('NAME'));
var_dump($container->getParameter('test'));

This is my services.yml file:

parameters:
  test: '%env(NAME)%'

And this is the output of the command NAME=madonna php test.php:

/Volumes/GIT/olvlvl/test-di-env/test.php:13:
string(7) "madonna"
/Volumes/GIT/olvlvl/test-di-env/test.php:14:
string(11) "%env(NAME)%"

I also read How to Set external Parameters in the Service Container but it doesn’t give more information, so I’m not sure what’s wrong.

Here is the package list:

symfony/config               v3.2.2 Symfony Config Component
symfony/dependency-injection v3.2.2 Symfony DependencyInjection Component
symfony/filesystem           v3.2.2 Symfony Filesystem Component
symfony/yaml                 v3.2.2 Symfony Yaml Component

Can you help?