ID:               28352
 Comment by:       phpbr at ecartz dot com
 Reported By:      hpdl at oscommerce dot com
 Status:           Bogus
 Bug Type:         Session related
 Operating System: Linux
 PHP Version:      4.3.4
 New Comment:

There are no relevant "Session Related" bug reports with text
"references", but I did find http://bugs.php.net/bug.php?id=17959
(under "Documentation problem") which includes the cited explanation. 
For some reason, the documentation on the global keyword (
http://www.php.net/manual/en/language.variables.scope.php ) does not
mention that the global keyword is merely a hack to set $var &=
$GLOBAL['var'] rather than a persistent mark of a variable as global. 
Reading the user comments or going to
http://www.php.net/manual/en/language.references.spot.php is necessary
to find this out.


Previous Comments:
------------------------------------------------------------------------

[2004-07-06 01:48:26] [EMAIL PROTECTED]

This has been explained in several bug reports. Please read the
'Session related' ones with text 'references' in them..


------------------------------------------------------------------------

[2004-05-10 19:02:18] hpdl at oscommerce dot com

Description:
------------
A global variable which references a session variable 
inside a class loses its global scope. 

Reproduce code:
---------------
<?php
session_start();

class test {
  function test() {
    global $b;

    if (!isset($_SESSION['a'])) {
      $_SESSION['a'] = 0;
    }

    $b =& $_SESSION['a'];
  }
}

$test = new test;

$b++;

echo $b;

echo '<br><br>';

echo '<a href="' . basename($_SERVER['PHP_SELF']) . ((defined('SID') &&
strlen(SID) > 0) ? '?' . SID : '') . '">reload</a>';
?>

Expected result:
----------------
The counter shown should be incremented on each page 
reload. 

Actual result:
--------------
The counter does not get incremented and stays at 1. 
 
Changing the following line: 
 
$b =& $_SESSION['a']; 
 
to: 
 
$GLOBALS['b'] =& $_SESSION['a']; 
 
produces the expected result. 


------------------------------------------------------------------------


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