passing session var. frm one page to

Could some one help me to solve this problem. How could I pass the session variable from one page to another (not use as form variables)

below is my two short programs that I wrote. I can't print the variable on the second page.

-----first phtml page ------
<?
session_start();
$temp = "word1";
// session_register($temp);
?>

<HEAD>

</HEAD>
<BODY>
this is testing page 1 
my temp variable is 
<? echo $temp ?>

 
Clik here to <A HREF="testing2.phtml">second</A> page

</BODY>

---- second phtml page ---

<?
session_start();
?>

<head>

<title>Untitled</title>

</head>

<body>

This is second testing page and passing varaible from the previous page is 
<? echo $temp ?>

</body>

Your help are very appreciated.

like this:

session_register('temp');

not like this:

session_register($temp);

sdfgsf