name="recipient" value="<?php echo $_SESSION['unique_name']; ?> " > </div> <button class="ms-Button"> <span class="ms-Button-label">Send mail</span> </button> <div> <?php // The user clicked the "Send mail" button if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['recipient'])) { try { MailManager::sendWelcomeMail($_POST['recipient']); ?> <p class="ms-font-m ms-fontColor-green"> Successfully sent an email to <?php echo $_POST['recipient']; ?> ! </p> <?php } catch (\RuntimeException $e) { ?> <p class="ms-font-m ms-fontColor-redDark"> Something went wrong, couldn't send an email.