From: rickd at commando-pernod dot net
Operating system: Win2000
PHP version: 5.0.3
PHP Bug Type: Zend Engine 2 problem
Bug description: OOP singleton instance
Description:
------------
We use a user singleton instance for our cms user authed ids that should
not be able to killed from third party addons or worse coders so easily,
but accessable from all.
But when someone get the instance with reference it can be killed easy
with setting the reference var to null, unset dont work.
If you put the static $instance holder inside the getinstance() function
it seems to be work correct and cant be deleted from setting reference to
NULL
Reproduce code:
---------------
class test {
static private $instance = null;
static function getinstance() {
if ( self::$instance == null ) {
return new test();
}
return self::$instance;
}
}
$user = &test::getinstance();
$user = null; // destroy singleton instance
$user = &test::getinstance();
unset( $user ); // dont destroy instance
Expected result:
----------------
singleton not destroying with setting a getted instance with
reference to null
Actual result:
--------------
singleton destroyed
--
Edit bug report at http://bugs.php.net/?id=32322&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=32322&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=32322&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=32322&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=32322&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=32322&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=32322&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=32322&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=32322&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=32322&r=support
Expected behavior: http://bugs.php.net/fix.php?id=32322&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=32322&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=32322&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=32322&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=32322&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=32322&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=32322&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=32322&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=32322&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=32322&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=32322&r=mysqlcfg
