too long

Question

What is the difference between these two code excerpts, respectively, in PHP?:

function eat_apple($apple)
{
    return true;
}

And:

function eat_apple()
{
    $apple = func_get_arg(0);
    return true;
}

Or is there a difference? If there is not, what is the point of func_get_arg()? Surely it serves some purpose I'm not aware of?

Answer 1

func_get_arg (and func_get_args) make it possible to have functions with a variable number of parameters, so called variadic functions.

Take array_merge as an example, which takes a variable number of arrays to be merged.