How can debugging techniques be applied to troubleshoot issues with PHP contact forms?

Issue: When submitting a PHP contact form, the form data is not being sent or processed correctly. To troubleshoot this issue, you can use debugging techniques such as checking for errors in the PHP code, verifying the form submission method, and ensuring that the form fields are correctly named and included in the form submission.

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = $_POST['name'];
    $email = $_POST['email'];
    $message = $_POST['message'];
    
    // Add code here to process the form data, such as sending an email
    
    // Example code to send an email
    $to = "recipient@example.com";
    $subject = "Contact Form Submission";
    $body = "Name: $name\nEmail: $email\nMessage: $message";
    
    if (mail($to, $subject, $body)) {
        echo "Message sent successfully";
    } else {
        echo "Error sending message";
    }
}
?>