What is the potential reason for a PHP tag appearing in a form when using Internet Explorer?

The potential reason for a PHP tag appearing in a form when using Internet Explorer is that the server-side PHP code is not being properly executed before the form is rendered in the browser. To solve this issue, you can make sure that the PHP code is processed before the form is displayed by ensuring that the file extension is .php and that the server is configured to interpret PHP code.

<?php
// Your PHP code here
?>
<!DOCTYPE html>
<html>
<head>
    <title>Your Form</title>
</head>
<body>
    <form action="process_form.php" method="post">
        <!-- Your form fields here -->
    </form>
</body>
</html>