$login_query = "SELECT * FROM admins WHERE username = ? and password = ?";

 $params = array($username, $salted);

 $login_result = sqlsrv_query($conn, $login_query, $params);

 if ($login_result == false){
     //die(mysql_error());  commented
     echo $username;

     echo $password;

     echo "Errors:";
     die( print_r( sqlsrv_errors(), true));
}