<?php
include ('mysql_connect.php')

if(isset($_POST['username']) && isset($_POST['password'] && $_POST['username'] != '' && $_POST['password'] != '') {
    $username = mysql_escape_string($_POST['username']);
    $password = mysql_escape_string(shal($_POST['password']));

        $sql = mysql_query ("INSERT INTO `accounts` (`Username`,`Password`) VALUES ('"$username."','"$password."')");

    echo 'REGISTRATION SUCCESSFUL';

} else {

echo '<form action="index.php" method="post">
Username: <input type="text" name="username" /><br />
Password: <input type="password" name="password" /><br />
<input type="Submit" name="submit" value="Register" />
</form>';
}
?>