Untitled

<!DOCTYPE html>
<html>
<head>
<style>
.error {
color: red;
}
</style>
<title>Register</title>
</head>
<body>
<form action="#" method="POST">
<h1 id="Signup">Sign Up</h1>
<input type="text" name="Username" placeholder="Please Enter a Username">
<span class="error"><? echo $errorusername;?></span>
<br>
<input type="password" name="Password" placeholder="Please Enter a Password">
<span class="error"><? echo $errorpass;?></span>
<br>
<input type="Submit" id ="Submit">


</form>
</body>
</html>

<?

$errorpass = "";
$errorusername ="";

if(isset($_POST['Submit'])) {
if(empty($_POST['Username'])) {
$errorusername = "name is required";
} else {
$Username = $_POST['Username'];

if (!preg_match("/^[a-zA-Z ]*$/", $Username)) {
$errorusername ="Only numbers allowed";
}
}
if(empty($_POST['password'])) {
$errorusername = " A password is required";
} else {
$password = $_POST['password'];

if (!preg_match("/^[a-zA-Z ]*$/", $password)) {
$errorpass = "Need to contain numbers and symbols";

?>