index.php

<?php
include 'connect.php';
define('salt','7hPqMO(m=F+!!L6(#Yhp-CdF, &Q}+cIrA;c@wcP(E--V<qRmq!v*aSnM;H=4cD0');


if(isset($_POST['username']) && isset($_POST['fullname']) && isset($_POST['email']) && isset($_POST['password'])) {
    $username = mysql_real_escape_string($_POST['username']);
    $fullname = mysql_real_escape_string($_POST['fullname']);
    $email = mysql_real_escape_string($_POST['email']);
    $password = mysql_real_escape_string($_POST['password']);
    $encryptedPassword = hash( 'whirlpool',salt.$password );

    $sql="INSERT INTO `users` (username, fullname, email, password)
    VALUES
    ('$username', '$fullname','$email','$encryptedPassword')";

    if(!mysql_query($sql,$connection)) {
        die('Error: ' . mysql_error());
    } else {
        mysql_close($connection);
        header('Location: login.php?redirectedFromRegister=1');
    }
}
?>

<html>
    <body>
        <form action="index.php" method="post">
            <h1>REGISTER</h1><hr/>

            Email:    <input type="text" name="email"/><br/>
            Full Name:<input type="text" name="fullname"/><br/>
            Username: <input type="text" name="username"/><br/>
            Password: <input type="password" name="password"/><br/>

            <input type="submit" value="REGISTER"/>
        </form>
    </body>
</html>