From: waxtonmax at yahoo dot com
Operating system: windows vista
PHP version: 5.2.6
PHP Bug Type: Session related
Bug description: Problem in Singletion object creation
Description:
------------
Hi
I have problem in singleton object creation. I having Apache and PHP
5.2.5
Below is the singleton code.
========== CODE ===============
POSTED HERE
========== CODE ===============
Problem:
i have opened a new browser and triggered this class, for the first time
the result
is fine, ie output was
Intializing ....
Now for the second time when i refreshed the page agiain it is displaying
the same output, it is not entering the else part in the "static function
getInstance() ".
Also i have opened another browser at the same time , and again trigger
this class , and also i am getting same dam.. output..
=== Doubts============
1) will PHP create a singleton object for per session or for entire engine
(like singleton object in java for entire JVM).
2) if the singleton object is for entire engine , why it is getting
initialized when i triggered the same class from some other browser,(ie) it
should not echo "initializing ..." , it should echo "Already init ()".
=== Doubts============
Please describe me what is happening here.
Regards
waxtonmax
Reproduce code:
---------------
<?php
class Logger {
static private $singleton;
private function __construct() {
}
private function __clone() {
}
static function getInstance() {
echo " ENTERING FOR GET INSTANCE.."."<br>";
if(Logger::$singleton == null) {
echo "Intializing ...."."<br>";;
Logger::$singleton = new Logger();
} else {
echo " Already init ()"."<br>";;
}
return Logger::$singleton;
}
/**
*
*/
public function logWriter($serverity , $errMsg) {
// DO SOME THING
}
}
Logger::getInstance()->logWriter(1, "This is the file content" );
?>
Expected result:
----------------
Same instance should used across all the session.
ie where new request come from different user, the same instance which is
instantiated first should be used
Actual result:
--------------
But new instance is created for every new request for the same session .
--
Edit bug report at http://bugs.php.net/?id=45930&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=45930&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=45930&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=45930&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45930&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=45930&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45930&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45930&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45930&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45930&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45930&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=45930&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=45930&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45930&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45930&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45930&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45930&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45930&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45930&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45930&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45930&r=mysqlcfg
