Using Sessions

Hi there,

When I'm using cookies, I just set the cookie to any information I want:

<?

$loginUserName = $HTTP_POST_VARS[loginUserName];
setcookie ("CkUserName", $loginUserName, time()+14400, "/", ".myDomain.com",0);

?>

then if I want to retrieve that cookie, I just call it:

<?

$CkUserName = $HTTP_COOKIE_VARS["CkUserName"];
echo "$CkUserName";

?>

This is just Great, but if I want to use sessions, cause so many programmers advice me to use sessions instead of cookies, so:

Q. How can I convert the above 2 scripts, to use sessions instead of cookies? because I searched the php manual and I couldn't find the way.

If you want to change the way you have been programming using cookies you could use the following instructions:
script one:
<?php
$loginUserName = $HTTP_POST_VARS[loginUserName];
session_start();
$CkUserName=$loginUserName;
session_register("CkUserName")
?>
script two:
<?php
session_start();
//shows the value stored
echo $CkUserName;
?>