public function buildKeyboardButton($text, $request_contact = false, $request_location = false)
{
$replyMarkup = array('text' => $text, 'request_contact' => $request_contact, 'request_location' => $request_location);
if ($url != "") {
$replyMarkup['url'] = $url;
} else {
if ($callback_data != "") {
$replyMarkup['callback_data'] = $callback_data;
} else {
if ($switch_inline_query != "") {
$replyMarkup['switch_inline_query'] = $switch_inline_query;
}
}
}
return $replyMarkup;
}