Can anyone help me figure out what is wrong with this code?

Answer 1

These lines cause the "undefined index" warnings.

$username = $_POST['user_name'];
$password = $_POST['password'];
$type = $_POST['user_type'];

When you submit a form to this script, $_POST is an array containing all the form elements. In your case the user_name, password and user_type form elements did not exist, or you did not submit a form. Thus, the array elements do not exist. When you try to read from a nonexistant array element, you get the "Undefined Index" notice.

The other warning is caused by this line:

$count = mysql_numrows($info);

You're passing $info, an array, to mysql_numrows. You should be passing it a result resource from a mysql_query. You should be passing $data to mysql_numrows.