On Mon, 7 Jul 2003 23:37:58 +0100, you wrote:
>On Mon, Jul 07, 2003 at 06:20:42PM +0100, David Otton wrote:
>> On Mon, 7 Jul 2003 17:36:26 +0100, you wrote:
>>
>> >I want to write a function (as I have written in several other languages) that
>> >obtains it's arguments dynamically (using func_get_arg()) and then assigns to that
>> >argument. Think of the way that scanf() works -- that sort of thing.
>> >
>> >I have distilled what I want to do in the code below. foo adds 1 to all of it's
>> >arguments.
>> >
>> >function foo () {
>> > $count = func_num_args();
>> > for($i = 0; $i <= $count; $i++) {
>> > $var = func_get_arg($i);
>> > // The following line should do it, but throws a syntax error
>> > &$var = $var + 1;
>> > }
>> >}
>> >
>> >$a = '1';
>> >$b = '2';
>> >$c = '3';
>> >
>> >foo($a, $b, $c);
>> But I get the feeling you're trying to modify the elements in-place? Any
>> particular reason?
>>
>> If it's because you want to return multiple values from the function,
>No, the reason that I want to do it is for the same reason that sscanf() does it -- I
>want
>to change the values of the variables that are passed to it.
So you really do want to modify the variables in-place? Well ok, it's your
code.
The only way to do this (from within PHP), AFAIK, is to shoehorn a
non-variable argument in there by passing the variables as an array.
<?
function foo($args) {
array_walk ($args, create_function ('&$a','$a++;'));
}
$a = 1;
$b = 2;
$c = 3;
foo (array (&$a, &$b, &$c));
echo ("$a, $b, $c");
?>
*shudder*.
The other option is to write in C and bolt it on as a custom extension.
(BTW, my first example used func_get_arg() in a loop to build an array when
I really should have used func_get_args().)
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