PHP gets the number of days, hours, minutes and seconds between the two timestamps

 public  function time_cha()
 {
         $s_date ="2015-12-12 16:00:00";
         $e_date ="2016-12-13 18:00:00";
       
         $cha = strtotime($e_date)-strtotime($s_date);
         
         // year 
         $year = floor((strtotime($e_date)-strtotime($s_date)) / (31536000));
         echo "1、 The difference is years ：".$year."  year <br/><br/>";

         // month 
         $month = floor(($cha - $year * 31536000) / (2592000));
         $month_total = floor($cha  / 2592000);
         echo "2、 Months difference ：".$month."  month <br/><br/>";// Except last year 
         echo "3、 Months difference ：".$month_total."  month <br/><br/>";// Total months 

         // Japan 
         $day_total = floor((strtotime($e_date)-strtotime($s_date))/86400);
         echo "4、 The total difference is ：".$day_total."  God <br/><br/>";

         // when 
         $hour = floor((strtotime($e_date)-strtotime($s_date))%86400/3600);
         $hour_total = floor((strtotime($e_date)-strtotime($s_date)));// Total phase difference N Hours 
         echo "5、 Hours difference ：".$hour."  Hours <br/><br/>";
         echo "6、 Total hours difference ：".$hour_total."  Hours <br/><br/>";

         // branch 
         $minute = floor((strtotime($e_date)-strtotime($s_date))%86400/60);
         $minute_total = floor((strtotime($e_date)-strtotime($s_date))/60);
         echo "7、 Minutes difference ：".$minute." minute <br/><br/>";
         echo "8、 Total minutes difference ：".$minute_total." minute <br/><br/>";

         // second 
         $second = floor((strtotime($e_date)-strtotime($s_date))%86400%60);
         $second_total = floor((strtotime($e_date)-strtotime($s_date)));
         echo "9、 Seconds difference ：".$second."  second <br/><br/>";
         echo "10、 Total seconds difference ：".$second_total."  second <br/><br/>";
}