<?php

require_once 'class.phpmailer.php';

$_POST = array_map('trim', $_POST);

$error = false;

if (!isset($_POST['contact_name']) || empty($_POST['contact_name'])) {
    $error = true;
}

if (!isset($_POST['contact_email']) || empty($_POST['contact_email']) || !PHPMailer::ValidateAddress($_POST['contact_email'])) {
    $error = true;
}

if (!isset($_POST['contact_body']) || empty($_POST['contact_body'])) {
    $error = true;
}

if (!isset($_POST['contact_check']) || empty($_POST['contact_check']) || (int) $_POST['contact_check'] !== ((int) $_POST['contact_check_data'][0] * (int) $_POST['contact_check_data'][1])) {
    $error = true;
}

if ($error) {
    exit('nok');
}

$mail = new PHPMailer();

$mail->CharSet = 'UTF-8';

$mail->SetFrom($_POST['contact_email'], $_POST['contact_name']);
$mail->AddAddress('example@example.com');
$mail->Subject = 'Wiadomość ze strony internetowej';
$mail->Body = $_POST['contact_body'];

if (!$mail->Send()) {
    exit('nok');
}

exit('ok'); 

 <form action="form/send.php" method="post" id="contactform">
                <fieldset>
                    <input type="text" name="contact_name" placeholder="Imię i nazwisko" required="required" tabindex="1" />
                    <input type="email" name="contact_email" placeholder="Adres e-mail" required="required" tabindex="2" />
                    <textarea rows="5" columns="10" name="contact_body" placeholder="Treść wiadomości" required="required" tabindex="3"></textarea>
                    <input type="submit" value="Wyślij" tabindex="5" />Podaj wynik: <span class="form_check_1"></span> &times; <span class="form_check_2"></span> = <input type="text" name="contact_check" maxlength="2" tabindex="4" />
                    <input type="hidden" name="contact_check_data" value="" />
                </fieldset>
            </form> 

$mail->Body = '
<table>
	<tbody>
		<tr>
			<td>Imię i nazwisko</td>
			<td>' . $cośtam .'</td>
		</tr>
		<tr>
			<td>Adres mailowy</td>
			<td>' . $cośtam2 .'</td>
		</tr>
	</tbody>
</table>
';