PHP时间转换天,小时,分钟,秒

 private function difference($enddate)
    {
      
    
        $startdate = time();
        $enddate = strtotime($enddate);
        $text = '';
        $date=floor(($enddate-$startdate)/86400);
        if ($date > 0) {
            $text .= $date . '天';
        }
        $hour=floor(($enddate-$startdate)%86400/3600);
        if ($hour > 0) {
            $text .= $hour . '小时';
        }
        $minute=floor(($enddate-$startdate)%86400/60);
        if ($minute > 0) {
             $time=$minute;
               $format = '%02d:%02d';
           
            $hours = floor($time / 60);
            $minutes = ($time % 60);
            $text .= $minutes . '分钟';
        }
        $second=floor(($enddate-$startdate)%86400%60);
        if ($second > 0) {
            $text .= $second . '秒';
        }
        if(!$text){
            $text = '';
        }else{
            $text = '倒计时:'.$text;
        }
        return $text;
    }