How to add value through the update? This code copies the value in the registration id to the url. For example, if id=1 then url=1. How to order update id=1 then url=id1, id=2 then url=id2. Thanks in advance!
I need this kind of
url = 'id+".$last_id."'
function register_user($register_data) {
    global $con;
   $con = mysqli_connect('Localhost','social','social','social');
    array_walk($register_data, 'array_sanitize');
    $register_data['password'] = md5($register_data['password']);
    $fields = '`' . implode('`, `', array_keys($register_data)) . '`';
    $data = '\'' . implode('\', \'', $register_data) . '\'';
    $insert = "INSERT INTO users($fields) VALUES ($data) ";
    mysqli_query($con,$insert);
    $last_id = mysqli_insert_id($con);
    $update = "UPDATE users SET url = '".$last_id."' WHERE id = ".$last_id." ";
    mysqli_query($con,$update );
}
 
    