#23705 [Ver->Csd]: Reassigned object-ref params don't propagate back properly.

ID: 23705 Updated by: zeev@php.net Reported By: joachim at lous dot org -Status: Verified +Status: Closed Bug Type: Zend Engine 2 problem Operating System: * PHP Version: 5.0.0b2-dev, 4.3.3RC2-dev New Comment: It's not a bug. Assigning by reference breaks any previous references that may have existed. So the implementation of replace() won't really work, as $dest ends up being a referenec to $src, but only locally in the replace() function, without effecting the global $dest. I can't think of an easy way of achieving replace() right now, but either way, the behavior you're experiencing is intended. FWIW, in PHP 5, it would be practical to implement replace() with simple assignment (=) instead of assign-by-ref (=&), if you're dealing with objects. Previous Comments: ------------------------------------------------------------------------ [2003-07-13 00:14:58] sniper@php.net Same result with ZE2. ------------------------------------------------------------------------ [2003-05-19 14:59:47] joachim at lous dot org It doesn't seem to be possible to replace a passed object references with a different one. I expected the following code to print "5": class a{ var $val; function a($val){ $this->val = $val;} } function replace(&$src, &$dest){ $dest =& $src; } $src = new a(2); $dest = new a(1); replace($src,$dest); $src->val=5; echo $dest->val; In stead it prints "1". Changing the '=&' to '=', it prints '2', as expected. Surely this must be a bug? If not, is there really no way to get the reference across? I need this for building trees: passing the current node pointer, have the function change the tree and make the ref point to a new current node. I can work around it by returning the new reference in stead, but that only works for one ref. Using binary installer from website. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=23705&edit=1