SESSION array not working

[achintya]

Hi guys,
I have learned about the use session from you guys but when I am trying to use it in the following code,it is not working as I need. My code is trying to save a variable value in session array but I am not getting the value that I have saved in another php file. I have saved a value in the upload.php like this

session_start();
$_SESSION['url']=$url; 

Now I am accessing this value in another page just like this

session_start();
$_SESSION['url']=$u; 

But $u seems have no value. Why ? can someone explain it?

[mudshark]

if you want to pass the session value of url to $u, you'd have to do it the other way around:

session_start(); 
$u = $_SESSION['url']; 

[achintya]

thanks guys. after using your correction,code is working as I have wanted it.