Symfony 7.1 introduces a new MapUploadedFile attribute to inject uploaded files into controller arguments.

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Symfony 7.1 introduces the new #[MapUploadedFile] attribute which allows mapping uploaded files to controller arguments. You can also apply constraints to the file for validation purposes. Additionally, you can inject a collection of files using this attribute.

New in Symfony 7.1: MapUploadedFile Attribute (Symfony Blog)