Description:
------------
I came across this situation:
I had and object named "grid" which was a wrapper for a table.
In $_SESSION I already had a mysql singleton wrapper.
I tried to set another session variable with the key "grid1" and value, lets say "text". The result I got was that PHP loaded the object "grid1" in $_SESSION.
After I changed the key name, let say "grid1_text" I got the expected results!

Reproduce code:
---------------
$grid1 = new GridPrototype();
$grid1->setPerPage(4);
$grid1->setID("1");	
$grid1->setKey();

$id = "1";
$key = "grid" . $id;
$_SESSION[$key] = $status;



Expected result:
----------------
I expect to have the $status variable accessible via $_SESSION['grid1']

Actual result:
--------------
$_SESSION['grid1'] points to the object $grid1