Sometimes, you want to create a list of available time zones to prompt your user to select his/her time zone. Fortunately, PHP offers timezone_identifiers_list (PHP 5 >= 5.2.0). You can create your list easily, using a function like this
<?php
/**
* Timezones list with GMT offset
*
* @return array
* @link http://stackoverflow.com/a/9328760
*/
function tz_list() {
$zones_array = array();
$timestamp = time();
foreach(timezone_identifiers_list() as $key => $zone) {
date_default_timezone_set($zone);
$zones_array[$key]['zone'] = $zone;
$zones_array[$key]['diff_from_GMT'] = 'UTC/GMT ' . date('P', $timestamp);
}
return $zones_array;
}
?>
The above function returns an array with all timezones and the GMT offset for each timezone.
Example
A simple example:
<div style="margin-top: 20px;">
<select style="font-family: 'Courier New', Courier, monospace; width: 450px;">
<option value="0">Please, select timezone</option>
<?php foreach(tz_list() as $t) { ?>
<option value="<?php print $t['zone'] ?>">
<?php print $t['diff_from_GMT'] . ' - ' . $t['zone'] ?>
</option>
<?php } ?>
</select>
</div>
References
From PHP manual
- timezone_identifiers_list (PHP 5 >= 5.2.0)
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