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Bug #55619 checkdate() returns incorrect results
Submitted: 2011-09-06 11:33 UTC Modified: 2011-09-06 12:03 UTC
From: invisiblexman2010 at gmail dot com Assigned:
Status: Not a bug Package: Date/time related
PHP Version: 5.3.2 OS: linux 2.6.32-33-generic on i686
Private report: No CVE-ID: None
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 [2011-09-06 11:33 UTC] invisiblexman2010 at gmail dot com 
Description:
------------
Function checkdate() returns incorrect results in some cases, when passed February 29 leap year.

Test script:
---------------
var_dump(checkdate('02', '29', '2100'));
var_dump(checkdate('02', '29', '1900'));

Expected result:
----------------
bool(true) bool(true)

Actual result:
--------------
bool(false) bool(false)

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 [2011-09-06 11:46 UTC] invisiblexman2010 at gmail dot com
-Summary: incorrect results +Summary: checkdate() returns incorrect results -PHP Version: Irrelevant +PHP Version: 5.3.2
 [2011-09-06 11:46 UTC] invisiblexman2010 at gmail dot com 
Update Summary section
 [2011-09-06 12:03 UTC] derick@php.net
-Status: Open +Status: Bogus
 [2011-09-06 12:03 UTC] derick@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

This is correct behaviour: http://en.wikipedia.org/wiki/Leap_year#Algorithm
 
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