#48483 [Opn->Bgs]: this pointer is not passed by reference correctly
| From: | scottmac@php.net | Date: | Tue, 09 Jun 2009 02:11:44 +0000 |
| Subject: | #48483 [Opn->Bgs]: this pointer is not passed by reference correctly | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-138123@lists.php.net to get a copy of this message | ||
ID: 48483
Updated by: scottmac@php.net
Reported By: chase at circleofmoms dot com
-Status: Open
+Status: Bogus
Bug Type: Class/Object related
Operating System: ubuntu 8.04
PHP Version: 5.2.9
New Comment:
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
You can't re-assign $this, ever. It prints an error normally but when
references are used it can't be properly detected.
Try the following and see the error.
<?php
class Thing {
var $data;
public function updateData($newData) {
$this = new Thing();
}
}
$thing = new Thing();
$thing->data = "foo";
$thing->updateData("bar");
Previous Comments:
------------------------------------------------------------------------
[2009-06-06 00:39:04] chase at circleofmoms dot com
Description:
------------
When you pass the $this pointer by reference and change data for the
object it points to, that data is not correctly updated.
Reproduce code:
---------------
function changeAddress(&$oldThing) {
$oldThing = new Thing();
}
class Thing {
var $data;
public function updateData($newData) {
ThingChanger::changeData($this,$newData);
var_dump($this);
var_dump($this->data);
}
}
class ThingChanger {
public static function changeData(&$thingToChange,$newData) {
changeAddress($thingToChange);
$thingToChange->data = $newData;
}
}
$thing = new Thing();
$thing->data = "foo";
$thing->updateData("bar");
Expected result:
----------------
object(Thing)#2 (1) {
["data"]=>
string(3) "bar"
}
string(3) "bar"
Actual result:
--------------
object(Thing)#2 (1) {
["data"]=>
string(3) "bar"
}
string(3) "foo"
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=48483&edit=1