時間判斷 當前時間 按月份設置vip

function nextDay($date,$month){
    //1獲取今天的時間  $date 時間     $date_day 今天的日期
    $date_day =date('d', strtotime($date));
    //2獲取N月後的時間
    $lastday = strtotime("$date +$month months");
    $last_day =date('d',$lastday);
    $day_benlastday = date('Y-m-d', $lastday);
     $day_t=date('Y-m-t',strtotime("$day_benlastday -1 month"));
     $day_benlast_day= date('t',strtotime($day_t));
    //獲取當天日期
    $Same_day = date('d', strtotime($date));
    //判斷N月後的天數是否比當前時間小 
    if($day_benlastday<$Same_day &&$last_day!==$date_day){
        $day = $day_benlast_day;
        $day = date('Y',$lastday).'-'.date('m',strtotime($day_t)).'-'.$day.' 23:59:59';
    }else{
        $day = $Same_day;
        $day = date('Y',$lastday).'-'.date('m',$lastday).'-'.$day.' 23:59:59';
        
    }
    
    
    return $day;
 
}



echo nextDay('2020-01-30 05:05:05',1);