From:
Operating system: debian
PHP version: 5.3.3
Package: Reproducible crash
Bug Type: Bug
Bug description:multiple instances made with a singleton
Description:
------------
Hello, first off, ive been searching but i couldnt find any related
bugreport and im sorry if i wasted your time.
I have 2 classes with both an singleton function in them, an api (test) and
a user (test2) class. The api uses the user data and the user class uses
the api to get its userdata. Hence i load the user class instance in the
api and vice versa.
It works if i use an external class to serve as a singleton storage but if
i use the static $instance it doesnt.
The singleton function does work when i remove the test2::getInstance()
from class test.
Test script:
---------------
class test {
private static $instance;
private $test2;
private function __construct() {
$this->test2 = test2::getInstance();
}
public static function getInstance() {
if (!isset(self::$instance)) {
echo '<br>new test instance';
$c = __CLASS__;
self::$instance = new $c;
}
return self::$instance;
}
}
class test2 {
private static $instance;
private $test;
private function __construct() {
$this->test = test::getInstance();
}
public static function getInstance() {
if (!isset(self::$instance)) {
echo '<br>new test2 instance';
$c = __CLASS__;
self::$instance = new $c;
}
return self::$instance;
}
}
print 'start:<br>';
for ($i = 1; $i < 10; $i++) {
print '<br>loop: '.$i;
$t = test::getInstance();
}
Expected result:
----------------
start:
loop: 1
new test instance
new tes2 instance
loop: 2
loop: 3
loop: 4
loop: 5
loop: 6
loop: 7
loop: 8
loop: 9
Actual result:
--------------
start:
loop: 1
new test instance
new test2 instance
new test instance
new test2 instance
new test instance
new test2 instance
new test instance
new test2 instance
new test instance
new test2 instance
...
till php runs out of memory
--
Edit bug report at http://bugs.php.net/bug.php?id=52653&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52653&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52653&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52653&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52653&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52653&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52653&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52653&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52653&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52653&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52653&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52653&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52653&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52653&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52653&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52653&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52653&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52653&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52653&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52653&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52653&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52653&r=mysqlcfg
