#20175 [NEW]: Static vars can't store ref to new instance
| From: | enigma at turingstudio dot com | Date: | Wed, 30 Oct 2002 19:34:48 +0000 |
| Subject: | #20175 [NEW]: Static vars can't store ref to new instance | ||
| Groups: | php.bugs | ||
| Request: | Send a blank email to php-bugs+get-23739@lists.php.net to get a copy of this message | ||
From: enigma@turingstudio.com
Operating system: All
PHP version: 4.2.1
PHP Bug Type: Scripting Engine problem
Bug description: Static vars can't store ref to new instance
ola,
we've recently put in a set of methods in the binarycloud
core classes so they can enforce their singleton status.
An example:
// {{{ method GetInstance()
/**
* This method enforces this class's singleton
* status. It check s astatic var for an instance,
* if that instance exists a reference to it
* is returned. If it does not exist it is created
* and a reference is returned.
* @author hans lellelid, hans@velum.net
* @access public
*/
function &GetInstance() {
static $instance;
if(!isset($instance)) {
$instance = new Request();
}
return $instance;
}
// }}}
note the line:
$instance = new Request();
that means the instance is always overwritten.
we have to do that because:
$instance =& new Request();
results in a null $instance.
We believe this is a bug, but it's on the edge of possible
expected behavior.
thanks,
_alex
--
Edit bug report at http://bugs.php.net/?id=20175&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=20175&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=20175&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=20175&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=20175&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=20175&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=20175&r=support
Expected behavior: http://bugs.php.net/fix.php?id=20175&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=20175&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=20175&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=20175&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=20175&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=20175&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=20175&r=isapi