| richardkmiller at gmail dot com 2006-08-23, 6:57 pm |
| From: richardkmiller at gmail dot com
Operating system: tested on Mac OS X and Windows
PHP version: Irrelevant
PHP Bug Type: Documentation problem
Bug description: Destructor may be called before all references to it are gone
Description:
------------
The documentation for PHP 5 destructors (http://php.net/
manual/en/language.oop5.decon.php) says "The destructor method
will be called as soon as all references to a particular
object are removed..." but this may not always be true.
In PHP 5.1, the mysqli object is destroyed before the
destructor of my class which refers to it, so I can't make
mysqli calls from my destructor.
Reproduce code:
---------------
<?php
$db = new mysqli('localhost', USERNAME, PASSWORD, DATABASE);
class Test
{
public function __construct()
{
global $db;
$db->query("SELECT 'test'");
}
public function __destruct()
{
global $db;
$db->query("SELECT 'test'"); // line 15
}
}
$test = new Test();
?>
Expected result:
----------------
I expect this code to produce no errors (no output).
Actual result:
--------------
This code produces the following warning:
Warning: mysqli::query() [function.mysqli-query]: Couldn't
fetch mysqli in test.php on line 15
This bug appears to have been documented at #31326 and #36034.
If it isn't planned to be fixed, the documentation should be
updated to read the following (quoting helly@php.net from
#36034):
"You cannot rely on any order of destruction in shutdown
sequence. All you can do is ensuring yourself that all related
variables are set NULL or are being unset() prior to script
end. If you do that in correct order then php calls the
destructors in correct order."
--
Edit bug report at http://bugs.php.net/?id=38572&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=38572&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=38572&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=38572&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=38572&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=38572&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=38572&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=38572&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=38572&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=38572&r=support
Expected behavior: http://bugs.php.net/fix.php?id=38572&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=38572&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=38572&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=38572&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=38572&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=38572&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=38572&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=38572&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=38572&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=38572&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=38572&r=mysqlcfg
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