#19875 [Bgs]: date/strtotime fails around time change

From: Date: Sat, 12 Oct 2002 12:03:15 +0000
Subject: #19875 [Bgs]: date/strtotime fails around time change
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-22216@lists.php.net to get a copy of this message 
 ID:               19875
 Updated by:       derick@php.net
 Reported By:      beryrinaldo@mac.com
 Status:           Bogus
 Bug Type:         Date/time related
 Operating System: Linux
 PHP Version:      4.2.3
 New Comment:

strtotime is ok, mktime is affected... use gmmktime.

Derick


Previous Comments:
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[2002-10-12 00:19:29] beryrinaldo@mac.com

I know it's daylight savings time, but why doesn't 
strtotime deal with it properly?

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[2002-10-11 21:53:26] sniper@php.net

We are happy to tell you that you just discovered Daylight Savings
Time. For more information see:
http://webexhibits.org/daylightsaving/b.html

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[2002-10-11 21:37:26] beryrinaldo@mac.com

Updated summary line.

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[2002-10-11 21:36:26] beryrinaldo@mac.com

Here is a short script:

<?php
        $goodday = mktime(0,0,0,10,20,2002);
        $goodsun = strtotime("Sun",$goodday);
        $goodmon = strtotime("Mon",$goodday);
        $gooddif = $goodmon - $goodsun;
        $goodsunstr = date("Ymd.Hi",$goodsun);
        $goodmonstr = date("Ymd.Hi",$goodmon);
 
print "$goodday $gooddif $goodsunstr $goodmonstr <br>\n";
 
        $okday = mktime(0,0,0,10,27,2002);
        $oksun = strtotime("Sun",$okday);
        $badmon = strtotime("Mon",$okday);
        $okdif = $badmon - $oksun;
        $oksunstr = date("Ymd.Hi",$oksun);
        $badmonstr = date("Ymd.Hi",$badmon);
print "$okday $okdif $oksunstr $badmonstr <br>\n";
 
echo "PHP version " . phpversion() . " <br>\n";
 
?>

The output of the script is this:

1035097200 86400 20021020.0000 20021021.0000 
1035702000 86400 20021027.0000 20021027.2300 
PHP version 4.2.3 

Although the difference between Sunday (Oct 27) and Monday is 24 hours,
the output from date shows it to be only 23.


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