Problem/Motivation Symfony 5.2 introduces InputBag, which replaces ParameterBag in some places. The main change is that ::all() can take an argument: https://github.com/symfony/http-foundation/blob/5.1/InputBag.php#L48-L51 Before: After: Steps to reproduce Proposed resolution Subclass InputBag and replace $request on the $request object with our subclass, with a forward compatibility layer which will support both the old ParameterBag::all() as well as the new InputBag::all() Remaining tasks User interface changes API changes Data model changes Release notes snippet