From:             [EMAIL PROTECTED]
Operating system: Linux 2.4.2
PHP version:      4.0.4pl1
PHP Bug Type:     Date/time related
Bug description:  strtotime() cannot properly handle some ISO 8601-compliant strings

I've recently run into a problem.  This problem has been addressed in bug report 
#9007, but I thought I would try to provide more detailed information.

First, I'm pulling ISO 8601-compliant date strings from a PostgreSQL 7.0.3.

We'll illustrate this bug with a sample date: 1999-06-24 00:01:00-05.  Or June 24, 
1999, 12:01 AM CDT.

$timestamp = "1999-06-24 00:01:00-05";
$timestamp = strtotime($timestamp);
print(strftime("%A, %B %d, %Y %H:%M %Z", $timestamp));

Now, that output /should/ read "Thursday, June 24, 1999 00:01 CDT," instead it reads 
"Wednesday, June 23, 1999 19:06 CDT."  Even though PHP knows the timezone of the 
machine to be CST6CDT, it subtracts 5 hours from the time during conversion, 

This is a Bad Thing(tm) because all programs should be ISO 8601-compliant.  Currently 
PHP4 is a lil' broken.  This should be fixed in the next release of PHP4, IMHO.  The 
bug probably actually resides in the code in ext/standard/parsedate.c that is borrowed 
from GNU Bison 1.28.  So maybe this bug should be reported to GNU's bug list as well.

In any case, here's a fix in the meantime...

If using PostgreSQL issue the command "SET DATESTYLE TO Postgres;" in all of your 
queries that return a timestamp.  That will cause the timestamp to be returned in this 
style: Thu Jun 24 00:01:00 1999 CDT.  This style will correctly parse, as we will 
illustrate with this example:

$timestamp = "Thu Jun 24 00:01:00 1999 CDT";
$timestamp = strtotime($timestamp);
print(strftime("%A, %B %d, %Y %H:%M %Z", $timestamp));

The output of this example is "Thursday, June 24, 1999 00:01 CDT," which is correct.

And that's all.

Derek P. Moore

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