<form id="contact-form" method="post" action="contact.php">

                    <div class="messages"></div>

                    <div class="controls">

                        <div class="row">
                            <div class="col-md-6">
                                <div class="form-group">
                                    <label for="form_name">Firstname *</label>
                                    <input id="form_name" type="text" name="name" class="form-control" placeholder="Please enter your firstname *" required="required" data-error="Firstname is required.">
                                    <div class="help-block with-errors"></div>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="form-group">
                                    <label for="form_lastname">Lastname *</label>
                                    <input id="form_lastname" type="text" name="surname" class="form-control" placeholder="Please enter your lastname *" required="required" data-error="Lastname is required.">
                                    <div class="help-block with-errors"></div>
                                </div>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-6">
                                <div class="form-group">
                                    <label for="form_email">Email *</label>
                                    <input id="form_email" type="email" name="email" class="form-control" placeholder="Please enter your email *" required="required" data-error="Valid email is required.">
                                    <div class="help-block with-errors"></div>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="form-group">
                                    <label for="form_phone">Phone</label>
                                    <input id="form_phone" type="tel" name="phone" class="form-control" placeholder="Please enter your phone">
                                    <div class="help-block with-errors"></div>
                                </div>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-12">
                                <div class="form-group">
                                    <label for="form_message">Message *</label>
                                    <textarea id="form_message" name="message" class="form-control" placeholder="Message for me *" rows="4" required="required" data-error="Please,leave us a message."></textarea>
                                    <div class="help-block with-errors"></div>
                                </div>

                                        <div class="form-group">
                        <div class="g-recaptcha" data-sitekey="6LcngVUUAAAAAPRVOHTSu3iGGpFoPF4Cu5Np8E3r" data-callback="verifyRecaptchaCallback" data-expired-callback="expiredRecaptchaCallback"></div>
                        <input class="form-control d-none" data-recaptcha="true" required data-error="Please complete the Captcha">
                        <div class="help-block with-errors"></div>
                            </div>
                    </div>

                            <div class="col-md-12">
                                <input type="submit" class="btn btn-success btn-send" value="Send message">
                            </div>
                        </div>
                        <div class="row">
                            <div class="col-md-12">
                                <p class="text-muted"><strong>*</strong> These fields are required.</p>
                            </div>
                        </div>
                    </div>

                </form>
</main>
<!-- Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js" integrity="sha384-cs/chFZiN24E4KMATLdqdvsezGxaGsi4hLGOzlXwp5UZB1LY//20VyM2taTB4QvJ" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>


<!-- Contact Form JS -->
<script src="https://www.google.com/recaptcha/api.js"></script>
<script src="validator.js"></script>
<script src="contact.js"></script>

$(function () {

window.verifyRecaptchaCallback = function (response) {
    $('input[data-recaptcha]').val(response).trigger('change');
}

window.expiredRecaptchaCallback = function () {
    $('input[data-recaptcha]').val("").trigger('change');
}

$('#contact-form').validator();

$('#contact-form').on('submit', function (e) {
    if (!e.isDefaultPrevented()) {
        var url = "contact.php";

        $.ajax({
            type: "POST",
            url: url,
            data: $(this).serialize(),
            success: function (data) {
                var messageAlert = 'alert-' + data.type;
                var messageText = data.message;

                var alertBox = '<div class="alert ' + messageAlert + ' alert-dismissable"><button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button>' + messageText + '</div>';
                if (messageAlert && messageText) {
                    $('#contact-form').find('.messages').html(alertBox);
                    $('#contact-form')[0].reset();
                    grecaptcha.reset();
                }
            }
        });
        return false;
      }
    })
  });

<?php
// require ReCaptcha class
require('recaptcha-master/src/autoload.php');

// configure
// an email address that will be in the From field of the email.
$from = 'infoh@designsingh.ca';

// an email address that will receive the email with the output of the form
$sendTo = 'info@designsingh.ca';

// subject of the email
$subject = 'New Message from Nirvaani Singh Designs Contact Form';

// form field names and their translations.
// array variable name => Text to appear in the email
$fields = array('name' => 'Name', 'surname' => 'Surname', 'phone' => 'Phone', 'email' => 'Email', 'message' => 'Message');

// message that will be displayed when everything is OK :)
$okMessage = 'Contact form successfully submitted. Thank you, I will get back to you soon!';

// If something goes wrong, we will display this message.
$errorMessage = 'There was an error while submitting the form. Please try again later';

// ReCaptch Secret
$recaptchaSecret = 'secret code';

// let's do the sending

// if you are not debugging and don't need error reporting, turn this   off by error_reporting(0);
error_reporting(E_ALL & ~E_NOTICE);

try {
if (!empty($_POST)) {

    // validate the ReCaptcha, if something is wrong, we throw an Exception,
    // i.e. code stops executing and goes to catch() block

    if (!isset($_POST['g-recaptcha-response'])) {
        throw new Exception('ReCaptcha is not set.');
    }

    // do not forget to enter your secret key from https://www.google.com/recaptcha/admin

    $recaptcha = new ReCaptchaReCaptcha($recaptchaSecret, new ReCaptchaRequestMethodCurlPost());

    // we validate the ReCaptcha field together with the user's IP address

    $response = $recaptcha->verify($_POST['g-recaptcha-response'], $_SERVER['REMOTE_ADDR']);

    if (!$response->isSuccess()) {
        throw new Exception('ReCaptcha was not validated.');
    }

    // everything went well, we can compose the message, as usually

    $emailText = "You have a new message from your contact formn=============================n";

    foreach ($_POST as $key => $value) {
        // If the field exists in the $fields array, include it in the email
        if (isset($fields[$key])) {
            $emailText .= "$fields[$key]: $valuen";
        }
    }

    // All the neccessary headers for the email.
    $headers = array('Content-Type: text/plain; charset="UTF-8";',
        'From: ' . $from,
        'Reply-To: ' . $from,
        'Return-Path: ' . $from,
    );

    // Send email
    mail($sendTo, $subject, $emailText, implode("n", $headers));

    $responseArray = array('type' => 'success', 'message' =>      $okMessage);
}
} catch (Exception $e) {
  $responseArray = array('type' => 'danger', 'message' =>   $e->getMessage());
   }

if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$encoded = json_encode($responseArray);

header('Content-Type: application/json');

  echo $encoded;
 } else {
echo $responseArray['message'];
}