Description:
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So i had this problem when you have a regular variable and a session variable with 
same names. Something like - $_SESSION['ses'] and $ses. So when you change the 
$ses to some value, the session value with the same name will change too. My 
Version is PHP 5.2.6. I havent changed anything in any php files. I use AppServ 
v2.5.10.

Test script:
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$_SESSION['s'] = "hey";
$s = "hello";

echo $_SESSION['s']." $s";

Expected result:
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hey hello

Actual result:
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hello hello