#40604 [NEW]: Objects disappear from the global scope

[dagdamor at simps dot ru]

From: dagdamor at simps dot ru
Operating system: Windows
PHP version: 5.2.1
PHP Bug Type: Class/Object related
Bug description: Objects disappear from the global scope

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e. not
objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program has
many objects in the global scope, some of them don't disappear, while
others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used global
variables, objects including in OB callbacks in PHP4, and it worked fine.
In other words, I hope this is not "You can't use global variables there"
case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error

--
Edit bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]
--
Try a CVS snapshot (PHP 4.4): [url]http://bugs.php.net/fix.php?id=40604&r=trysnapshot44[/url]
Try a CVS snapshot (PHP 5.2): [url]http://bugs.php.net/fix.php?id=40604&r=trysnapshot52[/url]
Try a CVS snapshot (PHP 6.0): [url]http://bugs.php.net/fix.php?id=40604&r=trysnapshot60[/url]
Fixed in CVS: [url]http://bugs.php.net/fix.php?id=40604&r=fixedcvs[/url]
Fixed in release: [url]http://bugs.php.net/fix.php?id=40604&r=alreadyfixed[/url]
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No Zend Extensions: [url]http://bugs.php.net/fix.php?id=40604&r=nozend[/url]
MySQL Configuration Error: [url]http://bugs.php.net/fix.php?id=40604&r=mysqlcfg[/url]

[helly@php.net]

ID: 40604
Updated by: [email]helly@php.net[/email]
Reported By: dagdamor at simps dot ru
-Status: Open
+Status: Bogus
Bug Type: Class/Object related
Operating System: Windows
PHP Version: 5.2.1
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
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

the object gets destroyed before you get output - well actually you
don't produce output


Previous Comments:
------------------------------------------------------------------------

[2007-02-23 08:49:07] dagdamor at simps dot ru

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e.
not objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program
has many objects in the global scope, some of them don't disappear,
while others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used
global variables, objects including in OB callbacks in PHP4, and it
worked fine. In other words, I hope this is not "You can't use global
variables there" case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error


------------------------------------------------------------------------


--
Edit this bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]

[dagdamor at simps dot ru]

ID: 40604
User updated by: dagdamor at simps dot ru
Reported By: dagdamor at simps dot ru
-Status: Bogus
+Status: Open
Bug Type: Class/Object related
Operating System: Windows
PHP Version: 5.2.1
New Comment:

I didn't understand your reply at all :( could you please provide a bit
more explanatory response?

I see that the object gets destroyed before the script ends its work
(since it's inaccessible in the provided example), but I don't
understand why it's expected behavior... I never destroyed that object
manually, and created it expecting it to work till the very end of
script.


Previous Comments:
------------------------------------------------------------------------

[2007-02-23 09:04:55] [email]helly@php.net[/email]

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

the object gets destroyed before you get output - well actually you
don\'t produce output

------------------------------------------------------------------------

[2007-02-23 08:49:07] dagdamor at simps dot ru

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e.
not objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program
has many objects in the global scope, some of them don't disappear,
while others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used
global variables, objects including in OB callbacks in PHP4, and it
worked fine. In other words, I hope this is not "You can't use global
variables there" case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error


------------------------------------------------------------------------


--
Edit this bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]

[tony2001@php.net]

ID: 40604
Updated by: [email]tony2001@php.net[/email]
Reported By: dagdamor at simps dot ru
-Status: Open
+Status: Bogus
Bug Type: Class/Object related
Operating System: Windows
PHP Version: 5.2.1
New Comment:

All objects are destroyed _before_ output callbacks are called.


Previous Comments:
------------------------------------------------------------------------

[2007-02-23 23:26:59] dagdamor at simps dot ru

I didn't understand your reply at all :( could you please provide a bit
more explanatory response?

I see that the object gets destroyed before the script ends its work
(since it's inaccessible in the provided example), but I don't
understand why it's expected behavior... I never destroyed that object
manually, and created it expecting it to work till the very end of
script.

------------------------------------------------------------------------

[2007-02-23 09:04:55] [email]helly@php.net[/email]

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

the object gets destroyed before you get output - well actually you
don\'t produce output

------------------------------------------------------------------------

[2007-02-23 08:49:07] dagdamor at simps dot ru

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e.
not objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program
has many objects in the global scope, some of them don't disappear,
while others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used
global variables, objects including in OB callbacks in PHP4, and it
worked fine. In other words, I hope this is not "You can't use global
variables there" case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error


------------------------------------------------------------------------


--
Edit this bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]

[dagdamor at simps dot ru]

ID: 40604
User updated by: dagdamor at simps dot ru
Reported By: dagdamor at simps dot ru
Status: Bogus
Bug Type: Class/Object related
Operating System: Windows
PHP Version: 5.2.1
New Comment:

Okay... I understand.

But since it's not obvious and is a BC break, maybe it makes sense to
write about the issue in the documentation? (For example, in the Output
Control section.) I don't want anyone else to stand on the same rake.


Previous Comments:
------------------------------------------------------------------------

[2007-02-23 23:33:43] [email]tony2001@php.net[/email]

All objects are destroyed _before_ output callbacks are called.

------------------------------------------------------------------------

[2007-02-23 23:26:59] dagdamor at simps dot ru

I didn't understand your reply at all :( could you please provide a bit
more explanatory response?

I see that the object gets destroyed before the script ends its work
(since it's inaccessible in the provided example), but I don't
understand why it's expected behavior... I never destroyed that object
manually, and created it expecting it to work till the very end of
script.

------------------------------------------------------------------------

[2007-02-23 09:04:55] [email]helly@php.net[/email]

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

the object gets destroyed before you get output - well actually you
don\'t produce output

------------------------------------------------------------------------

[2007-02-23 08:49:07] dagdamor at simps dot ru

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e.
not objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program
has many objects in the global scope, some of them don't disappear,
while others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used
global variables, objects including in OB callbacks in PHP4, and it
worked fine. In other words, I hope this is not "You can't use global
variables there" case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error


------------------------------------------------------------------------


--
Edit this bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]

[tony2001@php.net]

ID: 40604
Updated by: [email]tony2001@php.net[/email]
Reported By: dagdamor at simps dot ru
Status: Bogus
Bug Type: Class/Object related
Operating System: Windows
PHP Version: 5.2.1
New Comment:

>But since it's not obvious and is a BC break

BC break? This behaviour exists at least since 5.1.0.
And this can't be a BC break comparing to PHP4, for classes in PHP4 do
not have any destructors.

>maybe it makes sense to write about the issue in the documentation?

Probably.
I'm sure the documentation team would appreciate any help.


Previous Comments:
------------------------------------------------------------------------

[2007-02-23 23:46:42] dagdamor at simps dot ru

Okay... I understand.

But since it's not obvious and is a BC break, maybe it makes sense to
write about the issue in the documentation? (For example, in the Output
Control section.) I don't want anyone else to stand on the same rake.

------------------------------------------------------------------------

[2007-02-23 23:33:43] [email]tony2001@php.net[/email]

All objects are destroyed _before_ output callbacks are called.

------------------------------------------------------------------------

[2007-02-23 23:26:59] dagdamor at simps dot ru

I didn't understand your reply at all :( could you please provide a bit
more explanatory response?

I see that the object gets destroyed before the script ends its work
(since it's inaccessible in the provided example), but I don't
understand why it's expected behavior... I never destroyed that object
manually, and created it expecting it to work till the very end of
script.

------------------------------------------------------------------------

[2007-02-23 09:04:55] [email]helly@php.net[/email]

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
[url]http://www.php.net/manual/[/url] and the instructions on how to report
a bug at [url]http://bugs.php.net/how-to-report.php[/url]

the object gets destroyed before you get output - well actually you
don\'t produce output

------------------------------------------------------------------------

[2007-02-23 08:49:07] dagdamor at simps dot ru

Description:
------------
Objects seem to disappear from the global scope when you try to access
them from the output buffer callback function. Regular variables (i.e.
not objects) don't disappear and work alright.

After some additional research I've noticed that if your PHP program
has many objects in the global scope, some of them don't disappear,
while others do. Looks very strange...

I hope this is not documentation misinterpretation, because I used
global variables, objects including in OB callbacks in PHP4, and it
worked fine. In other words, I hope this is not "You can't use global
variables there" case.

Reproduce code:
---------------
<?php

function handler($content)
{
global $obj;
return isset($obj)?"OK":"Error";
}

class MyClass {}
$obj=new MyClass();

ob_start("handler");

?>

Expected result:
----------------
OK

Actual result:
--------------
Error


------------------------------------------------------------------------


--
Edit this bug report at [url]http://bugs.php.net/?id=40604&edit=1[/url]