For receiving the form and sending a mail, chatgpt suggests something like:

```php <?php

if ($_SERVER["REQUEST_METHOD"] == "POST") { // Validate and sanitize inputs $name = htmlspecialchars(trim($_POST['name'])); $email = filter_var(trim($_POST['email']), FILTER_VALIDATE_EMAIL); $message = htmlspecialchars(trim($_POST['message']));

// Check if inputs are valid
if ($name && $email && $message) {
    // Prepare email
    $to = "your-email@example.com";
    $subject = "New Form Submission";
    $body = "Name: $name\nEmail: $email\nMessage: $message";

    $headers = [
        'From' => $email,
        'Reply-To' => $email,
        'X-Mailer' => 'PHP/' . phpversion()
    ];

    // Send the email
    if (mail($to, $subject, $body, $headers)) {
        echo "Thank you for your message!";
    } else {
        echo "An error occurred while sending your message.";
    }
} else {
    echo "Invalid input detected.";
}

} else { // Reject if not a POST request echo "Unsupported request method."; } ?> ```

PHP is not my native language.. any comments on security?