Correct CLI configuration for Xdebug

[Crell]

I do not understand the difference, but the current configuration hangs for me. Derek recommended the following, which seems to work fine.

cf https://twitter.com/derickr/status/1591103603640762368

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[reynoldsalec]

As far as I can tell, XDEBUG_SESSION_START is still valid and hasn't been deprecated. From a brief look at the Xdebug docs, it seems like XDEBUG_TRIGGER allows you to set a trigger value that will initiate all types of Xdebug functionality (profiling, step or trace debugging), whereas XDEBUG_SESSION* is specific to step debugging.

I'm nervous to change these recommendations since they seem to work for a lot of people, would love some more feedback on this from someone who has rigorously tested Xdebug settings or understands the implications of using one setting vs another.