If you're good to your job and your manager find out you're building a side project, they may think you prepare to leave so you might take a salary raise for not leaving.
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Thanks! We support Python, JS, and Ruby right now (started with dynamic languages).
I'm not sure what you mean by prioritization on the issues, but generally we are trying to help you figure out what to upgrade next, and to actually do it too.
PHP would definitely be in scope, either that or Java are likely to be next for us. If you are familiar with PHPs ecosystem I'd be interested in your take on what's most important / problematic there.