Deprecating Services

Once you have decided to deprecate the use of a service (because it is outdated,

or you decided not to use and maintain it anymore), you can deprecate its

definition:

..configuration-block::

Now, every time a service is created using this deprecated definition will

trigger a deprecation error, advising you to stop or change your uses of that

service.

..note::

The deprecation message is optional. If not set, Symfony will show a default

message ``The '%service_id%' service is deprecated. You should stop using it,

as it will soon be removed.``.

..note::

The message is actually a template message, which will replace occurrences

of ``%service_id%`` by the service's id. You **must** have at least one

occurrence of ``%service_id%`` in your template message.

..note::

We really recommand you to fill the template message, to avoid a message that

could be too generic such as the default one. A good message explains

(shortly) why this service was deprecated, from which version and until when

it will be maintained.

For services decorators (see above), if the definition does not modify the

deprecated status, it will inherit the status from the definition that is

decorated.