Untitled

<?php
$username = htmlspecialchars($_POST['username']);
if (preg_match("/\s/",$username))
{
    die("do not use spaces, tabs or newlines in your username");
}
$email = htmlspecialchars($_POST['email']);
if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email))
{
    die("Invalid E-mail address");
}

$Password = htmlspecialchars($_POST['password']);
if (preg_match("/\s/",$Password))
{
    die("do not use spaces, tabs or newlines in your password");
}
?>

<html>
<body>

Your name is: <?php echo $username; ?><br />
Your password is: <?php echo $Password; ?><br />
Your e-mail: <?php echo $email; ?><br />
<?php echo "Please remember your details for future registration"; ?><br />
<br />

</body>
</html>

<?php
function check_input($data)
{
    $data = trim($data);
    $data = stripslashes($data);
    $data = htmlspecialchars($data);
    if ($problem && strlen($data) == 0)
    {
        die($problem);
    }
    return $data;
}

function show_error($anyError)
{
    ?>
    <html>
    <body>

    <b>Please correct the following errors:</b><br />
    <?php echo $myError; ?>

    </body>
    </html>
<?php
exit();
}
?>