Why am I getting this output

Bob's Auto Parts

Order Results

Order processed DW " ; ?>

from this code
<html>
<head>
<title>Bob's Auto Parts - Order Results</title>
</head>
<body>
<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
<?php echo "<p>Order processed DW </p>" ;
?>
</body>
</html>

Tearing my hair out.
--

Anthony Stefan Maciejowski