[PHP] Cannot pass values from one page to another

[murugesan]

Hello all,
    I have passed a value from 
index.php?uid="one"

I got this value in next page(main.php)
But from there I am not able to pass it to next page
I used 
session_register('uid');
in main.php
but in next page $uid is returning null

Any solutions?
-murugesan

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