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Bug #68195 Issue with day number / name in a week
Submitted: 2014-10-09 07:55 UTC Modified: 2014-10-09 08:30 UTC
From: sandro dot casa at gmail dot com Assigned:
Status: Not a bug Package: Date/time related
PHP Version: Irrelevant OS: Windows NT SCA 6.1 build 7601 (W
Private report: No CVE-ID: None
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 [2014-10-09 07:55 UTC] sandro dot casa at gmail dot com 
Description:
------------
---
From manual page: http://www.php.net/function.date
---
l (lowercase 'L'): A full textual representation of the day of the week	Sunday through Saturday

N ISO-8601:  numeric representation of the day of the week (added in PHP 5.1.0)	1 (for Monday) through 7 (for Sunday)

My PHP version is 5.5.6

Test script:
---------------
// My PHP version is 5.5.6
$date = '1900-01-01';
echo date('N', strtotime($date));    // ==> 4      
echo date('l', strtotime($date));    // ==> Thurday

The thing is the 1st of Jan 1900 was a Monday...

Expected result:
----------------
$date = '1900-01-01';
echo date('N', strtotime($date));    // ==> 1      
echo date('l', strtotime($date));    // ==> Monday

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 [2014-10-09 08:18 UTC] requinix@php.net
-Status: Open +Status: Not a bug -Package: Calendar related +Package: Date/time related
 [2014-10-09 08:18 UTC] requinix@php.net 
Unless you're running one of the experimental builds of PHP x64 for Windows (and probably not even then), your PHP cannot handle 1900 as a Unix timestamp. It's too far in the past for a 32-bit number.
strtotime() will fail, which means it will return false, which is basically 0, which corresponds to 1970-01-01. Try it:
  echo date('r', strtotime($date));

Fortunately, DateTime works differently.
  $date = new DateTime('1900-01-01');
  echo $date->format('N'); // 1
  echo $date->format('l'); // Monday
 [2014-10-09 08:30 UTC] sandro dot casa at gmail dot com 
Dear Guru,

thanks a ton for the workarround with the DateTime() function, 
you saved my day.

Regards,

Sandro
 
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