on a site im doing, I'm building a login script, its working fine however i have included it into a mini table under the navigation, the problem i having is I use the switch function to load the pages in the main area of the page and it works perfectly for all other links but not this one

when the user is logged in, this is echo'ed

Code:
echo "<a href='index.php?id=My Account'>My Account</a><br>";
and the code in the switch function is

Code:
case "My Account": include ('userinfo.php?user=$session->username');
the variable $session->username is what returns the users name so say I was logged in, my username is Shadows, it would look like this

Code:
userinfo.php?user=Shadows
however, this is not working

Code:
Warning: main(userinfo.php?user=$session->username): failed to open stream: No such file or directory in /home/shadows/public_html/1.0/index.php on line 129
any idea's on how I can get $session->username to return the logged in name onto the end of the link userinfo.php?user=