public static function clearOAuthInfo()
{
if (isset($_SESSION['t_access_token'])) {
unset($_SESSION['t_access_token']);
}
if (isset($_SESSION['t_expire_in'])) {
unset($_SESSION['t_expire_in']);
}
if (isset($_SESSION['t_code'])) {
unset($_SESSION['t_code']);
}
if (isset($_SESSION['t_openid'])) {
unset($_SESSION['t_openid']);
}
if (isset($_SESSION['t_openkey'])) {
unset($_SESSION['t_openkey']);
}
if (isset($_SESSION['t_oauth_version'])) {
unset($_SESSION['t_oauth_version']);
}
}