php: get variables visible in function

Question

is there any way to get list of variables that were defined in function, or list of all accessible variables in a function?

Answer 1

There is get_defined_vars():

This function returns a multidimensional array containing a list of all defined variables, be them environment, server or user-defined variables, within the scope that get_defined_vars() is called.

it has to be called within each function you want to analyze, though.

Answer 2

func_num_args — Returns the number of arguments passed to the function func_get_arg — Return an item from the argument list func_get_args — Returns an array comprising a function's argument list

Answer 3

http://php.net/manual/en/function.get-defined-vars.php

Documentation indeed ^^