How to know the name of a function ?

Hello

In a function, what is the best way to know the name
of this function ?
I read the documentation and found only func_num_args(),
func_get_arg() and func_get_args which are relative to the
arguments given to the function.
What is the equivalent to $0 (bash) in php ?

Thanks for your help

Cheers

-- 
Jean-Philippe Battu