Why does the code fall out after submit?

Question

css

Testing on XAMPP. After clicking on the sumbitbottom below the form, the code falls out. JSFiddle . Why does it fall out and how to remove it?
It looks like this:

or like this:

PHP piece:

<?php
    
    // Only process POST reqeusts.
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
        // Get the form fields and remove whitespace.
        $name = strip_tags(trim($_POST["name"]));
        $name = str_replace(array("\r","\n"),array(" "," "),$name);
        $email = filter_var(trim($_POST["email"]), FILTER_SANITIZE_EMAIL);
        $message = trim($_POST["message"]);

        // Check that data was sent to the mailer.
        if ( empty($name) OR empty($message) OR !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            // Set a 400 (bad request) response code and exit.
            http_response_code(400);
            echo "Oops! There was a problem with your submission. Please complete the form and try again.";
            exit;
        }

        // Set the recipient email address.
        $recipient = "[email protected]";

        // Set the email subject.
        $subject = "New contact from $name";

        // Build the email content.
        $email_content = "Name: $name\n";
        $email_content .= "Email: $email\n\n";
        $email_content .= "Message:\n$message\n";

        // Build the email headers.
        $email_headers = "From: $name <$email>";

        // 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.";
    }

?>

Answer 1

The problem is here:

if (data.responseText !== '') {
        $(formMessages).text(data.responseText);
      } else {
        $(formMessages).text('Упс! Что-то пошло не так, и Ваше сообщение не отправилось.');
      }

Comment out - $(formMessages).text(data.responseText);
Check what comes in data.responseText if you want to output a different text.

Answer 2

Your Ajax function inserts the received response into the block here approximately:
Why doesn’t it insert what you are trying to issue with echo - You need to figure it out already ... on the screen you generally have a 404 error, that is, the request is sent to the wrong place you want, or the server is configured incorrectly.