Configure services based on env var in Symfony 5.4 - php

Question

I am working on a project that uses many env vars and I used php files (rather than yaml files or xml) to deal with configurations.
I am trying to this code :
// config/may_conf_name.php
return static function (ContainerConfigurator $containerConfigurator): void {
$containerConfigurator->extension('my_extension', [
...
]);
// CLIENT_TYPE is an env variable
if ('http' === (string) env('CLIENT_TYPE')->string()) {
$services->alias(AbstractClient::class, HttpClient::class);
} else {
$services->alias(AbstractClient::class, AwsClient::class);
}
...
}
Unfortunately, env('CLIENT_TYPE')->string()) isn’t parsed
dump(
(string) env('CLIENT_TYPE')->string())
)
// output
^ "%env(string:CNT_CLIENT_TYPE)%"
Obviously, when I do this, it works for me :
if (isset($_ENV['CLIENT_TYPE']) && 'http' === $_ENV['CLIENT_TYPE']) {
....
}
So, my question is there a way to get my ‘CLIENT_TYPE’ env var like env('CLIENT_TYPE')->string()? Is it "clean" to do this with $_ENV['CLIENT_TYPE']?
Thank you!

Answer 1

Look at https://symfony.com/doc/current/service_container.html#binding-arguments-by-name-or-type
In your service.yaml or php in your case you can bind variable which will be autoimported inside autowired services.
In Yaml
bind:
$clientType: '%env(CLIENT_TYPE)%'
In php
->bind('$clientType', '%env(CLIENT_TYPE)%')
Then in any service where you want to use your environment var :
public function __construct(string $clientType)
$clientType will be autowired automatically with your binded configuration.
I don't know if this is exactly what you're looking for, dont hesitate to comment i will update my answer, but i hope it will at least give you an idea of what to do.
I asked for your SF version because autowiring is automatically working on 5.4 if you did not disabled it
If CLIENT TYPE is empty, it is not related to your symfony configuration. It mean that your env var is not properly written to your current env file.