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Symfony Framework: Using methods and constants in service parameters
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| services: | |
| My\Custom\Service: | |
| class: My\Custom\Service | |
| arguments: | |
| - "@=service('My\\\\Custom\\\\Config').getCustomString()" | |
| - !php/const My\Custom\ServiceConstants::MY_CONSTANT | |
| - "@=container.hasParameter('some_param') ? parameter('some_param') : 'default_value'" |
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The first argument is accessing the "getCustomString" method of the "My\Custom\Config" class. Be sure to use four backslashes in the namespace for escaping reasons. You can access any class that is registered as a service.
The second argument is getting the constant "MY_CONSTANT" from the "ServiceConstants" class using the "!php/const" annotation that was introduced in symfony 3.2. The expression language is not needed here.
The third argument is accessing a parameter from the service container
Read more on the expression language syntax in the official documentation.