Looks good. I've added your tests to the PHP implementation, and it is passing on them (as expected).

Are you planning to maintain your fork? Or still hoping to get this merged here at some point?

I'm not talking about my fork. I'm talking about https://github.com/jmespath/jmespath.php. :)

By added, I should have said "it will be added in the next few minutes". I've not yet merged the changes. ;)

Ah, didn't see that correctly (and didn't realize you could merge into this repo :))

I am helping maintain the PHP implementation only, at the moment. :)