download() public méthode

Download a vcard or vcal file to the browser.
public download ( )
/**
 * VCard Generator
 * @package chamilo.social
 * @author José Loguercio Silva <*****@*****.**>
 */
require_once '../inc/global.inc.php';
use JeroenDesloovere\VCard\VCard;
api_block_anonymous_users();
if (isset($_REQUEST['userId'])) {
    $userId = intval($_REQUEST['userId']);
} else {
    api_not_allowed();
}
// Return User Info to vCard Export
$userInfo = api_get_user_info($userId, true, false, true);
// Pre-Loaded User Info
$firstname = $userInfo['firstname'];
$lastname = $userInfo['lastname'];
$email = $userInfo['email'];
$phone = $userInfo['phone'];
$language = get_lang('Language') . ': ' . $userInfo['language'];
// Instance the vCard Class
$vcard = new VCard();
// Adding the User Info to the vCard
$vcard->addName($lastname, $firstname);
$vcard->addEmail($email);
$vcard->addPhoneNumber($phone, 'CELL');
$vcard->addNote($language);
// Generate the vCard
return $vcard->download();