WordPress Version: 3.7
/**
* Converts a GMT date into the correct format for the blog.
*
* Requires and returns a date in the Y-m-d H:i:s format. If there is a
* timezone_string available, the returned date is in that timezone, otherwise
* it simply adds the value of gmt_offset. Return format can be overridden
* using the $format parameter
*
* @since 1.2.0
*
* @param string $string The date to be converted.
* @param string $format The format string for the returned date (default is Y-m-d H:i:s)
* @return string Formatted date relative to the timezone / GMT offset.
*/
function get_date_from_gmt($string, $format = 'Y-m-d H:i:s')
{
$tz = get_option('timezone_string');
if ($tz) {
$datetime = date_create($string, new DateTimeZone('UTC'));
if (!$datetime) {
return date($format, 0);
}
$datetime->setTimezone(new DateTimeZone($tz));
$string_localtime = $datetime->format($format);
} else {
if (!preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches)) {
return date($format, 0);
}
$string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
$string_localtime = gmdate($format, $string_time + get_option('gmt_offset') * HOUR_IN_SECONDS);
}
return $string_localtime;
}