require_once "../config.php";

#Editing user's Id
if(isset($_GET['id'])){
    $id = $_GET['id'];
    $queryT = "SELECT * FROM teachers WHERE t_id = $id";
    $results = mysqli_query($link, $queryT);
    $myRow = mysqli_fetch_array($results);
}

$userName = htmlspecialchars($_POST['username']);

if(isset($_POST['submit'])){
if(empty($userName)){
        $userNameErr = "<span>Username is required!.</span>";
    }elseif($rowcount == 1 AND $userName != $myRow['username']){
        $userNameErr = "<span>That username is taken!.</span>";
    }