Describe the feature

setup-php should fail when it's unable to install the requested PHP version

Version

• I have checked releases, and the feature is missing in the latest patch version of v2.

Underlying issue

Currently, when setup-php fails to set up the requested PHP version, the build continues with the PHP version provided by the runner environment, which may not be compatible with the software being built/tested.

Describe alternatives

I tried to use env: fail-fast: true to no avail.

Additional context

This happens intermittently but quite often, so I couldn't run it with debugging enabled.

https://github.com/vimeo/psalm/actions/runs/4401974668/jobs/7708673538

Are you willing to submit a PR?

I'm not sure I'll be able to do this.