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According to the Symfony documentation, env() parameters were introduced in version 3.2, allowing to use environment variables in service container configuration:

# app/config/config.yml
doctrine:
    dbal:
        host: '%env(DATABASE_HOST)%'

However, when I try using this functionality in Drupal I get an exception stating:

The service XXX has a dependency on a non-existent parameter "env(DATABASE_HOST)"

Looking at the stack trace I only see references to the default ResolveParameterPlaceholdersPass and not to ResolveEnvPlaceholdersPass

I'm using Drupal 8.6.5 which uses symfony/dependency-injection v3.4.20

closed as off-topic by mradcliffe, Pierre.Vriens, leymannx, sanzante, DRUPWAY Jan 14 at 8:09

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  • Maybe I don't understand well, but why don't use .env file provided by Drupal ? – Hassan Gouzoul Jan 4 at 17:12
  • Good question. I'm not sure if it's supported or not. – mradcliffe Jan 4 at 18:44
  • 2
    This isn't supported. Here's a link to a "Plan" issue meaning it's an idea on maybe implementing it: drupal.org/project/drupal/issues/2879846 – mradcliffe Jan 4 at 18:52

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