ID: 33595
Comment by: letssurf at gmail dot com
Reported By: rodricg at sellingsource dot com
Status: Assigned
Bug Type: Class/Object related
Operating System: *
PHP Version: 6CVS-2005-08-02
Assigned To: dmitry
New Comment:
Thank you for your solution. It's the same path we had taken here. We
had created a kill() method to do the same job. Shame it hasn't been
fixed.
Thank you again :)
Previous Comments:
------------------------------------------------------------------------
[2006-01-17 19:08:55] rodricg at sellingsource dot com
You can avoid the memory leak by manually calling the destructors and
unsetting the recursive ref:
<?php
class A {
function __construct () {
$this->b = new B($this);
}
function __destruct () {
$this->b->__destruct();
}
}
class B {
function __construct ($parent = NULL) {
$this->parent = $parent;
}
function __destruct () {
unset($this->parent);
}
}
for ($i = 0 ; $i < 1000000 ; $i++) {
$a = new A();
$a->__destruct();
}
echo number_format(memory_get_usage());
?>
------------------------------------------------------------------------
[2006-01-17 17:56:50] letssurf at gmail dot com
I agree this is a very annoying bug for large scale projects and should
be fixed or noted in the manual.
What is the best work around for this bug?
------------------------------------------------------------------------
[2005-12-05 08:40:36] marek at lewczuk dot com
The bug still exists in 5.1.1. If this cannot be solved in near future
then I think it should be noted somewhere in the manual.
------------------------------------------------------------------------
[2005-08-01 11:00:32] [EMAIL PROTECTED]
Yes. This is different bug. However it is not very critical (as bug
#33487 too), because all memory is freed on request shutdown.
I don't know how to implement support for circular data structures
freeing without significant performance lose.
------------------------------------------------------------------------
[2005-07-07 03:49:52] rodricg at sellingsource dot com
Distinctly different than bug #33487 this only occurs when the object
contains a recursive reference. Add
echo number_format(memory_get_usage());
to the end of the script and you get 346,360,656. Then comment out
$this->parent = $parent and run again to get 53,832. I suspect the
internal reference is not properly invalidated upon the destruction of
class A. This would keep the ref count > 0 and foil garbage
collection. Unless I am missing something....
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/33595
--
Edit this bug report at http://bugs.php.net/?id=33595&edit=1
