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Date: Wed, 18 Apr 2012 00:02:31 +0200
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Subject: Variable-length args by reference
From: neufeind@php.net (Stefan Neufeind)

Hi,

the topic of variable argument-lists for functions in connection with
getting the parameters by reference came up. This is currently not
possible with func_get_args(), though a "hack" with debug_backtrace() is
possible.

How would you think about extending func_get_args() and func_get_arg()
to allow for:

	$args = func_get_args(FUNC_GET_ARGS_BY_REFERENCE);
	$arg0 = func_get_arg (0, FUNC_GET_ARGS_BY_REFERENCE);

(default would be FUNC_GET_ARGS_BY_COPY)


Currently only the following "hack" works:

function calc()
{
	$d = debug_backtrace();
        $args = $d[0]['args'];
        $args[0] *= 2;
        $args[1] *= 2;
}

$a = 5;
$b = 7;
var_dump ($a, $b);
calc(&$a, &$b);
var_dump ($a, $b);


Kind regards,
 Stefan