note 105705 modified in datetimezone.getoffset by danbrown
| From: | danbrown@php.net | Date: | Thu, 08 Sep 2011 16:15:44 +0000 |
| Subject: | note 105705 modified in datetimezone.getoffset by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-183042@lists.php.net to get a copy of this message | ||
A common problem is to format dates and times for XML documents.
The XML standard is defined as follows:
"
To specify a time zone, you can either enter a dateTime in UTC time by adding a "Z"
behind the time - like this:
<startdate>2002-05-30T09:30:10Z</startdate>
or you can specify an offset from the UTC time by adding a positive or negative time behind the
time - like this:
<startdate>2002-05-30T09:30:10-06:00</startdate>
"
Here is a possible solution in PHP:
<?php
if(date_default_timezone_get() == 'UTC') {
$offsetString = 'Z'; // No need to calculate offset, as default timezone is already UTC
} else {
$phpTime = '2002-05-30 09:30:10';
$millis = strtotime($phpTime); // Convert time to milliseconds since 1970, using default timezone
$timezone = new DateTimeZone(date_default_timezone_get()); // Get default system timezone to create
a new DateTimeZone object
$offset = $timezone->getOffset(new DateTime($phpTime)); // Offset in seconds to UTC
$offsetHours = round(abs($offset)/3600);
$offsetMinutes = round((abs($offset) - $offsetHours * 3600) / 60);
$offsetString = ($offset < 0 ? '-' : '+')
. ($offsetHours < 10 ? '0' : '') . $offsetHours
. ':'
. ($offsetMinutes < 10 ? '0' : '') . $offsetMinutes;
}
echo('<startdate>' . date('Y-m-d\TH:i:s', $millis) . $offsetString .
'</startdate>'); // This is the correct XML format
?>
--was--
A common problem is to format dates and times for XML documents.
The XML standard is defined as follows:
"
To specify a time zone, you can either enter a dateTime in UTC time by adding a "Z"
behind the time - like this:
<startdate>2002-05-30T09:30:10Z</startdate>
or you can specify an offset from the UTC time by adding a positive or negative time behind the
time - like this:
<startdate>2002-05-30T09:30:10-06:00</startdate>
"
Here is a possible solution in PHP:
<?php
if(date_default_timezone_get() == 'UTC') {
$offsetString = 'Z'; // No need to calculate offset, as default timezone is already UTC
} else {
$phpTime = '2002-05-30 09:30:10';
$millis = strtotime($phpTime); // Convert time to milliseconds since 1970, using default timezone
$timezone = new DateTimeZone(date_default_timezone_get()); // Get default system timezone to create
a new DateTimeZone object
$offset = $timezone->getOffset(new DateTime($phpTime)); // Offset in seconds to UTC
$offsetHours = round(abs($offset)/3600);
$offsetMinutes = round((abs($offset) - $offsetHours * 3600) / 60);
$offsetString = ($offset < 0 ? '-' : '+')
. ($offsetHours < 10 ? '0' : '') . $offsetHours
. ':'
. ($offsetMinutes < 10 ? '0' : '') . $offsetMinutes;
}
echo('<startdate>' . date('Y-m-d\TH:i:s', $millis) . $offsetString .
'</startdate>'); // This is the correct XML format
http://php.net/manual/en/datetimezone.getoffset.php