Improve PHP workflow and add PHP package workflow

[ad4g]

• Improve PHP workflow to add support for installing extensions as most PHP projects have extensions which are not default as requirements.
• Add a PHP package workflow to test PHP packages with different versions and supported OS.

I know you do not accept external actions here, but I have used shivammathur/setup-php in both these workflows as PHP does not have one tool to install extensions for all OS and it is difficult to maintain a workflow for different OS if one has to script to install extensions and keep track of them.

• Does not use an Action that isn't in the actions organization. Please See Improve PHP support in starter workflows. #221
• Does not send data to any 3rd party service except for the purposes of installing dependencies.
• Does not use a paid service or product.

Fixes #221

[ethomson]

I'm very excited to improve PHP support! However:

I know you do not accept external actions here...

That's correct, we do not. This is a hard restriction, and it's for the safety and security of the GitHub Actions platform and ecosystem. We'd like to see improvements to the actions/setup-php action to support this functionality. I'd love to see a collaboration with https://github.com/shivammathur/setup-php - that certainly seems like a sensible path forward that leverages the expertise that @shivammathur has.

But I regret that referencing actions outside the https://github.com/actions/ organization is not something that we'll include in the getting started CI workflows at the moment.

[ad4g]

@ethomson Thanks for the response.
I hope you consider this PR in the future, because in its current state the PHP Composer workflow as I said is of limited use.

[MasterOdin]

@ethomson Given the policy changes in #451, would it be possible to update this workflow then to pin shivammathur/setup-php to a sha and have this be merged?

[github-actions]

This pull request has become stale and will be closed automatically within a period of time. Sorry about that.