I created a login form that works great. But I realized the page my user is directed to can still be accessed by anybody. How do I protect the page being accessed only viewable by those logged in?

Do I need to place a script on the success page itself?

Here is my check\_login.php:

```
<?php
$host="localhost"; // Host name
$username="xxx"; // Mysql username
$password="xxx"; // Mysql password
$db_name="xxx"; // Database name
$tbl_name="xxx"; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password") or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// username and password sent from form
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);

$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

$count=mysql_num_rows($result);

$user_info = mysql_fetch_assoc($result);

 if( isset($user_info['url']) ) {

 session_register("myusername");
 session_register("mypassword");
     header('Location: ' . $user_info['url']); //Redirects to the supplied url from the DB
 } else {
  header("location:error.htm");
 }
 ?>

```