How can i get the list of available arguments for a php function

Question

Hi,

is there a way to get the available arguments for a php function?

Example: I want to call function1($arg1, $arg2=null)

How can i find out a priori, before i call the function, the number of arguments this function takes, and if it's possible what arguments.

As you can clearly see i am dynamically calling functions

Answer 1

ReflectionFunction

Answer 2

You can use the following functions from inside the function that is being called to determine how many arguments were passed and to get their values. I'm not sure how you would check what arguments a function expects.

func_num_args()

func_get_arg()

func_get_args

Answer 3

Normally, via ReflectionFunction. However, PHP functions can use variable arguments and in that case it's impossible to tell.