php获取下个月的今天

function getNextMonthEndDate($date){        $firstday = date('Y-m-01', strtotime($date));        $lastday = date('Y-m-d', strtotime("$firstday +2 month -1 day"));        return  $lastday;    }         function next_month_today($date){                //获取今天是一个月中的第多少天        $current_month_t =  date("t", strtotime($date));        $current_month_d= date("d", strtotime($date));        $current_month_m= date("m", strtotime($date));                 //获取下个月最后一天及下个月的总天数        $next_month_end=getNextMonthEndDate($date);        $next_month_t =  date("t", strtotime($next_month_end));                 $returnDate='';        if($current_month_d==$current_month_t){//月末            //获取下个月的月末            $returnDate=$next_month_end;        }else{//非月末            //获取下个月的今天            if($current_month_d>$next_month_t){ //如 01-30，二月没有今天,直接返回2月最后一天                $returnDate=$next_month_end;            }else{                $returnDate=date("Y-m", strtotime($next_month_end))."-".$current_month_d;            }        }        return $returnDate;    }         echo $date="2016-01-27";    echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";    echo next_month_today($date);    echo "<hr/>";