怎么判断当前是否登录

如何判断当前是否登录?$_session Mage::getSingleton(customer/session)if ($_session-isLoggedIn()

如何判断当前是否登录?

$_session = Mage::getSingleton('customer/session');if ($_session->isLoggedIn()) {    // do something} else {   // do another thing.}