Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

PHP - converting a date/time value to UTC

Posted on 2009-05-20
8
Medium Priority
?
2,435 Views
Last Modified: 2013-12-13
How would I convert the following date/time object to UTC?

$opening_time = date('Y-m-d H:i:s', time());

- Yvan
0
Comment
Question by:egoselfaxis
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
  • 2
8 Comments
 
LVL 7

Expert Comment

by:ycTIN
ID: 24433559
echo $opening_time = date(DATE_RFC822);
0
 
LVL 7

Expert Comment

by:ycTIN
ID: 24433580

DATE_ATOM (string)
Atom (example: 2005-08-15T15:52:01+00:00) 
 
DATE_COOKIE (string)
HTTP Cookies (example: Monday, 15-Aug-05 15:52:01 UTC) 
 
DATE_ISO8601 (string)
ISO-8601 (example: 2005-08-15T15:52:01+0000) 
 
DATE_RFC822 (string)
RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000) 
 
DATE_RFC850 (string)
RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC) 
 
DATE_RFC1036 (string)
RFC 1036 (example: Mon, 15 Aug 05 15:52:01 +0000) 
 
DATE_RFC1123 (string)
RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000) 
 
DATE_RFC2822 (string)
RFC 2822 (Mon, 15 Aug 2005 15:52:01 +0000) 
 
DATE_RFC3339 (string)
Same as DATE_ATOM (since PHP 5.1.3) 
 
DATE_RSS (string)
RSS (Mon, 15 Aug 2005 15:52:01 +0000) 
 
DATE_W3C (string)
World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00) 

Open in new window

0
 
LVL 7

Expert Comment

by:szewkam
ID: 24433693
Something like this?
$opening_time = date('Y-m-d H:i:s', strtotime($opening_time)-date("Z"));

Open in new window

0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:egoselfaxis
ID: 24433761
>> echo $opening_time = date(DATE_RFC822);

This generates the incorrect date/time object for me.

When I ran the script, . it generated the following:

Wed, 20 May 09 10:28:43 -0600

However, the UTC time shoud have actually been 04:28 pm.

I'm currently in EST time zone, .. and it appears that the UTC time offset is merely 4 hrs.

How can I adapt my existing date/time object by adding 4 hrs to the time?

$opening_time = date('Y-m-d H:i:s', time());

 I'm aware of how to do this with the date, .. though I'm not sure if it's possbile to do this with times (and if it intelligentlly increments the date +1 when necessary, etc). Please advise.

- Yvan



 
0
 

Author Comment

by:egoselfaxis
ID: 24433775
>> $opening_time = date('Y-m-d H:i:s', strtotime($opening_time)-date("Z"));

This renders the date as "1969-12-31 23:00:00 " -- which is also incorrect
0
 
LVL 7

Expert Comment

by:szewkam
ID: 24433884
i show how to convert existing $opening_time to UTC ;)
Try this:
$opening_time = date('Y-m-d H:i:s', time()-date("Z")) ;).
0
 
LVL 7

Accepted Solution

by:
ycTIN earned 2000 total points
ID: 24433983
http://www.php.net/manual/en/function.date.php

http://www.php.net/date_default_timezone_set
http://www.php.net/manual/en/timezones.php

//you can put this into config file
date_default_timezone_set("America/New_York");
 
echo $opening_time = date('Y-m-d h:i:s a', time());

Open in new window

0
 

Author Comment

by:egoselfaxis
ID: 24434925
>> date_default_timezone_set("America/New_York");

I set this to .. date_default_timezone_set("UTC"); ... right before my variable assignment, and that seemed to do the trick.  Thanks!

- yg
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Password hashing is better than message digests or encryption, and you should be using it instead of message digests or encryption.  Find out why and how in this article, which supplements the original article on PHP Client Registration, Login, Logo…
This article discusses how to implement server side field validation and display customized error messages to the client.
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
Suggested Courses

609 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question