求下礼拜的日期

$current = date('Y-m-d',$_SERVER['REQUEST_TIME']); //或者$current2 = date('Y-m-d',time());$next_week = date('Y-m-d',$_SERVER['REQUEST_TIME']+(7*24*60*60));    //或者$next_week2 = date('Y-m-d',time()+(7*24*60*60));