/**
* Get WordPress timezone setting.
*
* Always returns a valid timezone string even when the setting is a GMT offset.
*
* @since 3.0.0
*
* @return null|string
*/
function simcal_get_wp_timezone()
{
$timezone = get_option('timezone_string');
if (empty($timezone)) {
$gmt = get_option('gmt_offset');
$timezone = simcal_get_timezone_from_gmt_offset($gmt);
}
return $timezone;
}
/**
* Set the timezone.
*
* @since 3.0.0
*
* @param string $tz Timezone.
*/
public function set_timezone($tz = '')
{
$site_tz = esc_attr(simcal_get_wp_timezone());
if ($this->feed === 'grouped-calendars') {
$this->timezone = $site_tz;
return;
}
if (empty($tz)) {
$timezone_setting = get_post_meta($this->id, '_feed_timezone_setting', true);
if ('use_site' == $timezone_setting) {
$tz = $site_tz;
} elseif ('use_custom' == $timezone_setting) {
$custom_timezone = esc_attr(get_post_meta($this->id, '_feed_timezone', true));
// One may be using a non standard timezone in GMT (UTC) offset format.
if (strpos($custom_timezone, 'UTC+') === 0 || strpos($custom_timezone, 'UTC-') === 0) {
$tz = simcal_get_timezone_from_gmt_offset(substr($custom_timezone, 3));
} else {
$tz = !empty($custom_timezone) ? $custom_timezone : 'UTC';
}
}
$this->timezone = empty($tz) ? 'UTC' : $tz;
return;
}
$this->site_timezone = $site_tz;
$this->timezone = simcal_esc_timezone($tz, $this->timezone);
}
