abs + strtotime give the same result for different date subtractions

Question

I've got this code:

<?php

$data = array(array("1","name1","2050-10-10"),array("2","name1","2051-10-10"));
$date = date("Y-m-d");
$x = 2;

foreach($data as $day)
{
$interval[] = abs(strtotime($date) - strtotime($day[$x]));
$interval[] = $day[$x];
}

var_dump($interval);

?>

I tried it on my own server :

It returns :

array(1) { 
[0]=> array(4) { 
  [0]=> int(1418338800) 
  [1]=> string(10) "2050-10-10" 
  [2]=> int(1418338800) 
  [3]=> string(10) "2051-10-10"    
} 
}

but http://writecodeonline.com/php/ returns :

array(4) {
  [0]=>
  int(1130716800)
  [1]=>
  string(10) "2050-10-10"
  [2]=>
  int(1162252800)
  [3]=>
  string(10) "2051-10-10"
}

I don't understand why the value 1418338800 stays the same and I wonder how I could solve this problem!

Thank you a lot in advance

Following the @Jonathan Kuhn advice:

<?php

echo strtotime("2051-10-10");
echo strtotime("2050-10-10");
echo strtotime("2040-10-10");
echo strtotime("2039-10-10");
echo strtotime("2038-10-10");
echo strtotime("2037-10-10");
echo strtotime("2036-10-10");

?>

It returns:

empty line
empty line
empty line
empty line
empty line
2138738400
2107202400

The problem came from the 32 bit system.

Your question indicates that there are two different dates being used, but in your code both of them say "2050-10-10". Are you sure you pasted the code correctly? — dg99, Dec 12 '14 at 00:25
Integer overflow maybe? 32 bit systems run out of timestamps on `03:14:07 UTC on 19 January 2038` — Jonathan Kuhn, Dec 12 '14 at 00:28
Try checking that the timestamps for both dates aren't the same and what timestamp do you get for each date? — Jonathan Kuhn, Dec 12 '14 at 00:32
@Jonathan Kuhn I didn't know about 32 bits systems timestamps limitation... Could I find a workaround? — user1719210, Dec 12 '14 at 00:32
From what I see the code works fine: http://codepad.viper-7.com/GD3PaX — Jonathan Kuhn, Dec 12 '14 at 00:32
@user1719210 - workround is either to switch to 64-bit PHP, or to start using DateTime objects — Mark Baker, Dec 12 '14 at 00:34
On a 32bit system, don't use timestamps for dates past 2038. You can use the datetime class. See: http://stackoverflow.com/questions/5319710/accessing-dates-in-php-beyond-2038 — Jonathan Kuhn, Dec 12 '14 at 00:34
Thank you a lot !! Is there any other things I need to take care of on a 32 bit system? Is there a good documentation about the limitations? For anybody else having this issue, I found this : http://en.wikipedia.org/wiki/Year_2038_problem Thank you very much! — user1719210, Dec 12 '14 at 00:42
possible duplicate of **[PHP strtotime returning false for UTC time](http://stackoverflow.com/questions/19547043/php-strtotime-returning-false-for-utc-time)** — Glavić, Dec 12 '14 at 06:49

abs + strtotime give the same result for different date subtractions

0 Answers0