#25484 [Opn]: functions which accept a reference from inside a loop lose their value
| From: | nick at itomic dot com | Date: | Thu, 11 Sep 2003 08:22:40 +0000 |
| Subject: | #25484 [Opn]: functions which accept a reference from inside a loop lose their value | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-47433@lists.php.net to get a copy of this message | ||
ID: 25484
User updated by: nick at itomic dot com
Reported By: nick at itomic dot com
Status: Open
Bug Type: Zend Engine 2 problem
Operating System: Redhat 9
PHP Version: 4.3.2
New Comment:
sorry the third paragraph should read:
I can see the situation where an object needs to be passed a reference
to an object, _not_ a copy of an object(i.e. when dealing with
obbject trees, or lists).
Previous Comments:
------------------------------------------------------------------------
[2003-09-11 04:20:23] nick at itomic dot com
Description:
------------
when a class function accepts a reference parameter & stores that
reference in the object, if that parameter passed in is created &
recreated inside a loop, then the reference that the class points to
changes to the last value of the parameter in the loop.
This is confusing behavious, but it is not necessary buggy behavious no
PHP's behalf, maybe it just requires better documentation.
I can see the situation where an object needs to be passed a reference
to an object, _not_ a copy of a reference (i.e. when dealing with
obbject trees, or lists).
In the below example this may differ from when I am passing in some
pre-existing variable (i.e. a variable returned from a class iterator),
rather than a variable that is created in the loop
Reproduce code:
---------------
<?php
// plz note this is pseudo code
$res = mysql_query(...);
// this part of the code has been tested
while ($row = mysql_fetch_assoc($res))
{
$foos[] =& new foo($row);
}
foreach($foos as $key => $foo)
{
var_dump($foos[$key]->_var);
}
class foo
{
var $_var = NULL;
function foo(&$var)
{
$this->_var =& $var;
}
}
Expected result:
----------------
something like:
array(2) {
["StageID"]=>
string(1) "1"
["StageName"]=>
string(10) "Incomplete"
}
array(2) {
["StageID"]=>
string(1) "2"
["StageName"]=>
string(8) "Complete"
}
array(2) {
["StageID"]=>
string(1) "3"
["StageName"]=>
string(10) "Not Needed"
}
array(2) {
["StageID"]=>
string(1) "4"
["StageName"]=>
string(7) "Waiting"
}
array(2) {
["StageID"]=>
string(1) "5"
["StageName"]=>
string(9) "Submitted"
}
Actual result:
--------------
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=25484&edit=1