PHP date_diff返回错误的值来比较两个日期时间

Question

I found this post that shows how to get the difference in hours between two dates.

The dates are: 2017-07-03 13:55:20 AND 2017-07-04 21:17:44

When I tried using this code it gives me wrong value:

$date1 = date_create('2017-07-03 13:55:20');

$date2 = date_create('2017-07-04 21:17:44');

$diff = date_diff($date1,$date2);

$hour = $diff->h;

returns 8 hours //incorrect

But this one gives me the correct value:

$hourdiff = round((strtotime('2017-07-03 13:55:20') - strtotime('2017-07-04 21:17:44'))/3600);
returns 31 hours //correct

Answer 1

You have to go this way:

<?php
$date1 = date_create('2017-07-03 13:55:20');
$date2 = date_create('2017-07-04 21:17:44');

$diff = date_diff($date1,$date2);

$hour = ($diff->d * 24) + $diff->h;
echo $hour;

demo: http://ideone.com/7SBfHn

The date_diff function gives you the difference as follow:

             y  m  d  h  m  s
-----------------------------
Date1:    2017-07-03 13:55:20
             |  |  |  |  |  |
Diff:        0  0  1  8  0 24
             |  |  |  |  |  |
Date2:    2017-07-04 21:17:44