On Thu, 15 Sep 2005, Todd Ruth wrote:
> Aha! That was the inspiration I needed to get the right
> combination of "&"s. The following bit of code behaves
> differently under 4.3 vs 4.4:
>
> <?php
> function f(&$a) { return $a; }
> $x = array('a','b','c');
> foreach (array_keys($x) as $k) {
> // I think the following line disconnects $y in 4.3
> // but leaves $y connected in 4.4
> $y =& f($x[$k]);
> $z[] =& $y;
> }
> var_dump($x);
> var_dump($z);
> ?>
>
> My guess would be that in 4.3 the engine tries to do the
> reference even though it may be dangerous. That would
> "disconnect" $y from the previous $z[]. 4.4 knows the
> reference is impossible and leaves $y connected to the
> previous $z[]. Is that analysis correct, engine gurus?
Yes, it is. This has bitten me too a couple of times. But ofcourse, the
new behavior *is* the correct one.
Derick
--
Derick Rethans
http://derickrethans.nl | http://ez.no | http://xdebug.org
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