php - SQL Query based on URL -

i have sql query brings information based on sessions cookie.

i want make link users profile , have url account.php?id=danny want run sql query pass through bit after ?id=

my current sql query

select id,firstname,lastname,usr,admin,email,car  tz_members usr='{$_session['usr']}'" 

i want make username url

you variables passed through url $_get. so

$user = $_get['id']; //check $user variable avoid sql injections  $sql = "select id,firstname,lastname,usr,admin,email,car tz_members usr='".$user."'