Edit report at http://bugs.php.net/bug.php?id=44552&edit=1
ID: 44552
Updated by: johan...@php.net
Reported by: andre at webkr dot de
Summary: $this can be overwritten by setting a reference
-Status: Open
+Status: Bogus
Type: Feature/Change Request
Package: *General Issues
Operating System: Tested on Windows and Linux
PHP Version: 5.2.5
Block user comment: N
Private report: N
New Comment:
.
Previous Comments:
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[2010-12-22 13:36:48] johan...@php.net
We can't prevent people from shooting in their feet. We can make it a
bit harder but not fully prevent it
------------------------------------------------------------------------
[2008-03-27 15:38:31] andre at webkr dot de
Description:
------------
Usually $this cannot be set. But by creating a reference to $this it
can.
In the example the reference is created by the =& operator. The problem
is also valid when passing $this to a function by reference.
I think an error should be generated because both $this = 1 and $this =&
$x do generate an error.
Reproduce code:
---------------
class testclass
{
function foo()
{
var_dump($this); // object(testclass)#1 (0) { }
$this->bar();
var_dump($this); // object(testclass)#1 (0) { }
}
function bar()
{
$a =& $this;
$a = 1;
var_dump($this); // int(1)
}
}
$b = new testclass;
$b->foo();
Expected result:
----------------
Fatal error: Cannot re-assign $this in eval()'d code on line 12
Actual result:
--------------
object(testclass)#1 (0) { }
int(1)
object(testclass)#1 (0) { }
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=44552&edit=1
