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Doc Bug #61314 Cannot mix European and 2 digit year
Submitted: 2012-03-07 09:14 UTC Modified: 2015-09-01 23:55 UTC
Votes:2
Avg. Score:4.5 ± 0.5
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:0 (0.0%)
From: mwwaygoo at hotmail dot com Assigned: cmb (profile)
Status: Closed Package: Date/time related
PHP Version: 5.3.10 OS: Ubuntu 11.10
Private report: No CVE-ID: None
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 [2012-03-07 09:14 UTC] mwwaygoo at hotmail dot com 
Description:
------------
---
From manual page: http://www.php.net/function.strtotime
---

Specifying a date of 10-11-77 will epoch, and not create the timestamp for 10-11-1977 as expected, according to the two notes on the strtotime() function page shown below.
This should really say "whereas if the separator is a dot (.), then the European d.m.y format is assumed"

    Note:

    If the number of the year is specified in a two digit format, the values between 00-69 are mapped to 2000-2069 and 70-99 to 1970-1999.


    Note:

    ...whereas if the separator is a dash (-) or a dot (.), then the European d-m-y format is assumed.


Test script:
---------------
echo date("Y-m-d H:i:s", strtotime("10-11-77 03:12:01")); // unexpected fail: supposed to be d/m/y with year 77 auto changed to 1977
echo date("Y-m-d H:i:s", strtotime("10.11.77 03:12:01")); // pass: EUR d/m/y with year 77 auto changed to 1977
echo date("Y-m-d H:i:s", strtotime("10/11/77 03:12:01")); // pass: US m/d/y
echo date("Y-m-d H:i:s", strtotime("77-11-10 03:12:01")); // pass: ISO 8601 y-m-d
echo date("Y-m-d H:i:s", strtotime("77/11/10 03:12:01")); // expected fail: US m/d/y data incorrect


Expected result:
----------------
1977-11-10 03:12:01
1977-11-10 03:12:01
1977-10-11 03:12:01
1977-11-10 03:12:01
1970-01-01 00:00:00

Actual result:
--------------
1970-01-01 00:00:00
1977-11-10 03:12:01
1977-10-11 03:12:01
1977-11-10 03:12:01
1970-01-01 00:00:00

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 [2012-03-07 09:21 UTC] aharvey@php.net
-Package: PHP options/info functions +Package: Date/time related
 [2015-08-31 18:21 UTC] cmb@php.net
-Status: Open +Status: Verified -Type: Bug +Type: Documentation Problem -Assigned To: +Assigned To: cmb
 [2015-08-31 18:21 UTC] cmb@php.net 
> Specifying a date of 10-11-77 will epoch, […]

No, strtotime() will fail for such a "date", and return FALSE as
documented.

> This should really say "whereas if the separator is a dot (.),
> then the European d.m.y format is assumed".

I agree, that some clarification in the manual is in order.
 [2015-09-01 23:52 UTC] cmb@php.net 
Automatic comment from SVN on behalf of cmb
Revision: http://svn.php.net/viewvc/?view=revision&revision=337698
Log: clarified behavior of nn-nn-nn parsing (fixes #61314)
 [2015-09-01 23:55 UTC] cmb@php.net
-Status: Verified +Status: Closed
 [2015-09-01 23:55 UTC] cmb@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.
 
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