profiles with sessions php -

recently i've added search feature find users through database , encountered question upon selecting searched user:

-example: john doe searches user; john doe clicks link go users profile (view_profile.php). -should echoing out info want display searched user via using mysql_fetch_array($username) , storing desired info in session variables?

should passing session variables create profiles other users view. or should every profile have it's own file? thanks.

set link comes when user searched to:

<a href="view_profile.php?userid=*put user id here*">*put user name here*</a> 

when user clickes link, php should users row database with:

$_get['userid']; 

sql query:

select * users id = *put user id here* 

don't use $_session variables this. hope helped out.