mail.php

<?php

    // Only process POST reqeusts.
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        // Get the form fields and remove whitespace.
        $fname = $_POST["fname"];
		$lname = $_POST["lname"];
        $phone = $_POST["phone"];
        $email = $_POST["email"];
        $message = $_POST["message"];
        
        // Set the recipient email address.
        $recipient = "tony@testapainting.com";

        // Set the email subject.
        $subject = "TestaPainting.com: $name";

        // Build the email content.
        $email_content = "Name: $fname $lname \n";
        $email_content .= "Email: $email\n\n";
        $email_content .= "Phone: $phone\n\n";
        $email_content .= "Message:\n$message\n";

        // Build the email headers.
        $email_headers = "From: $fname <noreply@testapainting.com>";

        // Send the email.
        if (mail($recipient, $subject, $email_content, $email_headers)) {
            // Set a 200 (okay) response code.
            http_response_code(200);
            echo "Thank You! Your message has been sent.";
        } else {
            // Set a 500 (internal server error) response code.
            http_response_code(500);
            echo "Oops! Something went wrong and we couldn't send your message.";
        }

    } else {
        // Not a POST request, set a 403 (forbidden) response code.
        http_response_code(403);
        echo "There was a problem with your submission, please try again.";
    }

?>