public function exportUserListAsvCard30() { $userlist = User_old::getUserList(); foreach ($userlist as $user) { $vcardlist .= "BEGIN:VCARD\n"; $vcardlist .= "NICKNAME:{$user['nickname']}\n"; $vcardlist .= "EMAIL:{$user['email']}\n"; if (!empty($user['vorname']) and !empty($user['nachname'])) { $vcardlist .= "FN:{$user['vorname']} {$user['nachname']}\n"; $vcardlist .= "N:{$user['nachname']};{$user['vorname']};;;\n"; } $vcardlist .= "VERSION:3.0\n"; $vcardlist .= "END:VCARD\n\n"; } return $vcardlist; }