function kind_get_timezones()
{
$o = array();
$t_zones = timezone_identifiers_list();
foreach ($t_zones as $a) {
$t = '';
try {
//this throws exception for 'US/Pacific-New'
$zone = new DateTimeZone($a);
$seconds = $zone->getOffset(new DateTime("now", $zone));
$o[] = tz_seconds_to_offset($seconds);
} catch (Exception $e) {
//die("Exception : " . $e->getMessage() . '<br />');
//what to do in catch ? , nothing just relax
}
}
$o = array_unique($o);
asort($o);
return $o;
}
<?php
/**
* Provides the 'Time' view for the corresponding tab in the Post Meta Box.
*
*
* @package Indieweb_Post_Kinds
*/
$tzlist = kind_get_timezones();
$tz_seconds = get_option('gmt_offset') * 3600;
$offset = tz_seconds_to_offset($tz_seconds);
$start_offset = ifset($time['start_offset']) ?: $offset;
$end_offset = ifset($time['end_offset']) ?: $offset;
?>
<div class="inside hidden">
<p>Time Properties</p>
<div id="kindmetatab-time">
<label for="published"><?php
_e('Published/Start', 'Post kind');
?>
</label><br/>
<input type="date" name="time[start_date]" id="start_date" value="<?php
echo ifset($time['start_date']);
?>
"/>
<input type="time" name="time[start_time]" id="start_time" step="1" value="<?php
echo ifset($time['start_time']);
?>
"/>
<select name="time[start_offset]" id="start_offset">