what is this notice referring to
<p>Notice: Undefined index: name in C:\wamp\www\espn.com\registration.php on line 12</p>

<p>Notice: Undefined index: username in C:\wamp\www\espn.com\registration.php on line 13</p>

<p>Notice: Undefined index: password in C:\wamp\www\espn.com\registration.php on line 14
I'm sorry but the username you specified has already been taken. Please pick another one.</p>

<p>coding </p>

<pre><code>&lt;html&gt;
&lt;body&gt;
&lt;?php
$dbhost = "localhost";
$dbname = "users";
$dbuser = "root";
$dbpass = "*******";

mysql_connect ($dbhost,$dbuser,$dbpass)or die("Could not connect: ".mysql_error());
mysql_select_db($dbname) or die(mysql_error());

$name = $_POST['name'];
$username = $_POST['username'];
$password = md5($_POST['password']);

$checkuser = mysql_query("SELECT username FROM users WHERE username='$username'"); 

$username_exist = mysql_num_rows($checkuser);

if($username_exist &gt; 1){
    echo "I'm sorry but the username you specified has already been taken.  Please pick another one.";
    unset($username);
    include 'registration.html';
    exit();
}

$query = "INSERT INTO users (name,username, password)
VALUES('$name','$username', '$password')";
mysql_query($query) or die(mysql_error());
mysql_close();

echo "You have successfully registered";
?&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
