php difference between two dates

1//get Date diff as intervals 
2$d1 = new DateTime("2018-01-10 00:00:00");
3$d2 = new DateTime("2019-05-18 01:23:45");
4$interval = $d1->diff($d2);
5$diffInSeconds = $interval->s; //45
6$diffInMinutes = $interval->i; //23
7$diffInHours   = $interval->h; //8
8$diffInDays    = $interval->d; //21
9$diffInMonths  = $interval->m; //4
10$diffInYears   = $interval->y; //1
11
12//or get Date difference as total difference
13$d1 = strtotime("2018-01-10 00:00:00");
14$d2 = strtotime("2019-05-18 01:23:45");
15$totalSecondsDiff = abs($d1-$d2); //42600225
16$totalMinutesDiff = $totalSecondsDiff/60; //710003.75
17$totalHoursDiff   = $totalSecondsDiff/60/60;//11833.39
18$totalDaysDiff    = $totalSecondsDiff/60/60/24; //493.05
19$totalMonthsDiff  = $totalSecondsDiff/60/60/24/30; //16.43
20$totalYearsDiff   = $totalSecondsDiff/60/60/24/365; //1.35

1$datetime1 	= new DateTime('2020-10-11 16:52:52');
2$datetime2 	= new DateTime('2020-10-13 16:52:52');
3$interval 	= $datetime1->diff($datetime2);
4
5echo $interval->format('%a days');

1$now = time(); // or your date as well
2$your_date = strtotime("2010-01-31");
3$datediff = $now - $your_date;
4
5echo round($datediff / (60 * 60 * 24));

1$timeFirst  = strtotime('2011-05-12 18:20:20');
2$timeSecond = strtotime('2011-05-13 18:20:20');
3$differenceInSeconds = $timeSecond - $timeFirst;
4

1$date1 = "2007-03-24";
2$date2 = "2009-06-26";
3
4$diff = abs(strtotime($date2) - strtotime($date1));
5
6$years = floor($diff / (365*60*60*24));
7$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
8$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));
9
10printf("%d years, %d months, %d days\n", $years, $months, $days);

1$period = new DatePeriod(
2     new DateTime('2010-10-01'),
3     new DateInterval('P1D'),
4     new DateTime('2010-10-05')
5);
6
7//Which should get you an array with DateTime objects. 
8
9//To iterate
10
11foreach ($period as $key => $value) {
12    //$value->format('Y-m-d')       
13}