<div class="row">
                    <div class="col-xs-12 col-md-8">
                        <div class="contact-form">
                            <form action="process.php" id="contact-form" method="post">
                                <div class="form-double">
                                    <input type="text" id="form-name" name="form-name" placeholder="Ваше ім'я" required="required">
                                    <input type="number" placeholder="Номер телефону">
                                </div>
                                <div class="form-double">
                                    <input type="email" name="form-email" name="email" id="form-email" placeholder="Електронна пошта" required="required">
                                    <input type="text" name="form-subject" id="form-subject" placeholder="Тема" required="required">
                                </div>
                                <textarea name="form-message" id="message" id="form-message" rows="5" required="required" placeholder="Текс попідомлення"></textarea>
                                <button class="bttn bttn-primary">Надіслати</button>
                            </form>
                        </div>
                    </div>

<?php
// Configure your Subject Prefix and Recipient here
$subjectPrefix = '[Contact via website]';
$emailTo       = 'моя_пошта@домен агресора';
$errors = array(); // array to hold validation errors
$data   = array(); // array to pass back data
if($_SERVER['REQUEST_METHOD'] === 'POST') {
    $name    = stripslashes(trim($_POST['name']));
    $email   = stripslashes(trim($_POST['email']));
    $subject = stripslashes(trim($_POST['subject']));
    $message = stripslashes(trim($_POST['message']));
    if (empty($name)) {
        $errors['name'] = 'Name is required.';
    }
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $errors['email'] = 'Email is invalid.';
    }
    if (empty($subject)) {
        $errors['subject'] = 'Subject is required.';
    }
    if (empty($message)) {
        $errors['message'] = 'Message is required.';
    }
    // if there are any errors in our errors array, return a success boolean or false
    if (!empty($errors)) {
        $data['success'] = false;
        $data['errors']  = $errors;
    } else {
        $subject = "$subjectPrefix $subject";
        $body    = '
            <strong>Name: </strong>'.$name.'<br />
            <strong>Email: </strong>'.$email.'<br />
            <strong>Message: </strong>'.nl2br($message).'<br />
        ';
        $headers  = "MIME-Version: 1.1" . PHP_EOL;
        $headers .= "Content-type: text/html; charset=utf-8" . PHP_EOL;
        $headers .= "Content-Transfer-Encoding: 8bit" . PHP_EOL;
        $headers .= "Date: " . date('r', $_SERVER['REQUEST_TIME']) . PHP_EOL;
        $headers .= "Message-ID: <" . $_SERVER['REQUEST_TIME'] . md5($_SERVER['REQUEST_TIME']) . '@' . $_SERVER['SERVER_NAME'] . '>' . PHP_EOL;
        $headers .= "From: " . "=?UTF-8?B?".base64_encode($name)."?=" . "<$email>" . PHP_EOL;
        $headers .= "Return-Path: $emailTo" . PHP_EOL;
        $headers .= "Reply-To: $email" . PHP_EOL;
        $headers .= "X-Mailer: PHP/". phpversion() . PHP_EOL;
        $headers .= "X-Originating-IP: " . $_SERVER['SERVER_ADDR'] . PHP_EOL;
        mail($emailTo, "=?utf-8?B?" . base64_encode($subject) . "?=", $body, $headers);
        $data['success'] = true;
        $data['message'] = 'Вітаю. Ваше повідомлення надіслано успішно.';
    }
    // return all our data to an AJAX call
    echo json_encode($data);
}

/*
--------------------------------
Ajax Contact Form
--------------------------------
+ https://github.com/mehedidb/Ajax_Contact_Form
+ A Simple Ajax Contact Form developed in PHP with HTML5 Form validation.
+ Has a fallback in jQuery for browsers that do not support HTML5 form validation.
+ version 1.0.1
+ Copyright 2016 Mehedi Hasan Nahid
+ Licensed under the MIT license
+ https://github.com/mehedidb/Ajax_Contact_Form
*/

(function ($, window, document, undefined) {
    'use strict';

    var $form = $('#contact-form');

    $form.submit(function (e) {
        // remove the error class
        $('.form-group').removeClass('has-error');
        $('.help-block').remove();

        // get the form data
        var formData = {
            'name' : $('input[name="form-name"]').val(),
            'email' : $('input[name="form-email"]').val(),
            'subject' : $('input[name="form-subject"]').val(),
            'message' : $('textarea[name="form-message"]').val()
        };

        // process the form
        $.ajax({
            type : 'POST',
            url  : 'process.php',
            data : formData,
            dataType : 'json',
            encode : true
        }).done(function (data) {
            // handle errors
            if (!data.success) {
                if (data.errors.name) {
                    $('#name-field').addClass('has-error');
                    $('#name-field').find('.col-lg-10').append('<span class="help-block">' + data.errors.name + '</span>');
                }

                if (data.errors.email) {
                    $('#email-field').addClass('has-error');
                    $('#email-field').find('.col-lg-10').append('<span class="help-block">' + data.errors.email + '</span>');
                }

                if (data.errors.subject) {
                    $('#subject-field').addClass('has-error');
                    $('#subject-field').find('.col-lg-10').append('<span class="help-block">' + data.errors.subject + '</span>');
                }

                if (data.errors.message) {
                    $('#message-field').addClass('has-error');
                    $('#message-field').find('.col-lg-10').append('<span class="help-block">' + data.errors.message + '</span>');
                }
            } else {
                // display success message
                $form.html('<div class="alert alert-success">' + data.message + '</div>');
            }
        }).fail(function (data) {
            // for debug
            console.log(data)
        });

        e.preventDefault();
    });
}(jQuery, window, document));