insert user dot php

<html>
<body>
<h1>User Creation</h1>
<?php
session_start();
if($_SESSION['login'] !="OK")
{
header('Location:login.php');
exit();
}

$new_user = $_POST["new_username"];
$new_pass = $_POST["new_password"];

if($new_user!=""&&$new_pass!="")
{

$host = "localhost";
$admin_user ="username";
$admin_pass ="user_password";
$db="database_name";

$conn = @mysql_connect($host,$admin_user,$admin_pass) or die ("Sorry - unable to connect to
MYSQL database.");
$rs = @mysql_select_db($db,$conn) or die ("error");
$sql = "INSERT INTO table_name (username, password) VALUES ('$new_user', '$new_pass')";
mysql_query($sql,$conn) or die ("User creation failed.");
echo"<p>User created successfully.</p>";
echo"<p>Return to <a href='protected.php'>application</a> or <a href='login.php'>log
out</a></p>";

}
else
  header('Location: create_user.php');

?>
</body>
</html>