__file__ , __line__

[jeditdog]

I was tearing apart some PHPBB code and come upon 2 glorious constants that I never knew existed:
FILE & LINE

It's kind of hard to search on and underscore, so I'm wondering, is there a list on php.net or elsewhere that takes about these?

Is there any other than these 2? They are so handy!

[Shrike]

In the manual, under the section constants of all places.