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Give me a sane way to remember when to add an underscore and when not to add an underscore after str:

I wonder why they don't deprecate the str_* functions and create "normal" str{funcname} functions, for better consistency.

str without underscore is for functions that exist in C. They appear with the same name in PHP.

Am I missing strpos in C[1]?

And this is a reason to pick on people who use php?

But it's so hip to do!

I did not pick on him or anybody else, I mentioned something that bothers me.