timezone_identifiers_list
(PHP 5 >= 5.1.0)
timezone_identifiers_list — Returns numerically index array with all timezone identifiers
Описание
array timezone_identifiers_list
( void
)
array DateTimeZone::listIdentifiers
( void
)
Возвращаемые значения
Returns array on success or FALSE on failure.
Примеры
Пример #1 A timezone_identifiers_list() example
<?php
$timezone_identifiers = DateTimeZone::listIdentifiers();
for ($i=0; $i < 5; $i++) {
echo "$timezone_identifiers[$i]\n";
}
?>
Результатом выполнения данного примера будет что-то подобное:
Africa/Abidjan Africa/Accra Africa/Addis_Ababa Africa/Algiers Africa/Asmera
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Коментарии
This is the updated code from below. This one has been debugged so it doesn't receive any warnings or errors like the code below will receive. Hope this helps.
<?php
function get_tz_options($selectedzone, $label, $desc = '')
{
echo '<div class="label"><label for="edited_user_timezone">'.$label.':</label></div>';
echo '<div class="input"><select name="edited_user_timezone">';
function timezonechoice($selectedzone) {
$all = timezone_identifiers_list();
$i = 0;
foreach($all AS $zone) {
$zone = explode('/',$zone);
$zonen[$i]['continent'] = isset($zone[0]) ? $zone[0] : '';
$zonen[$i]['city'] = isset($zone[1]) ? $zone[1] : '';
$zonen[$i]['subcity'] = isset($zone[2]) ? $zone[2] : '';
$i++;
}
asort($zonen);
$structure = '';
foreach($zonen AS $zone) {
extract($zone);
if($continent == 'Africa' || $continent == 'America' || $continent == 'Antarctica' || $continent == 'Arctic' || $continent == 'Asia' || $continent == 'Atlantic' || $continent == 'Australia' || $continent == 'Europe' || $continent == 'Indian' || $continent == 'Pacific') {
if(!isset($selectcontinent)) {
$structure .= '<optgroup label="'.$continent.'">'; // continent
} elseif($selectcontinent != $continent) {
$structure .= '</optgroup><optgroup label="'.$continent.'">'; // continent
}
if(isset($city) != ''){
if (!empty($subcity) != ''){
$city = $city . '/'. $subcity;
}
$structure .= "<option ".((($continent.'/'.$city)==$selectedzone)?'selected="selected "':'')." value=\"".($continent.'/'.$city)."\">".str_replace('_',' ',$city)."</option>"; //Timezone
} else {
if (!empty($subcity) != ''){
$city = $city . '/'. $subcity;
}
$structure .= "<option ".(($continent==$selectedzone)?'selected="selected "':'')." value=\"".$continent."\">".$continent."</option>"; //Timezone
}
$selectcontinent = $continent;
}
}
$structure .= '</optgroup>';
return $structure;
}
echo timezonechoice($selectedzone);
echo '</select>';
echo '<span class="notes"> '.$desc.' </span></div>';
}
?>
A better code snippet to return useful timezone information that can be used in a drop menu, for example:
<?php
$zones = timezone_identifiers_list();
foreach ($zones as $zone)
{
$zone = explode('/', $zone); // 0 => Continent, 1 => City
// Only use "friendly" continent names
if ($zone[0] == 'Africa' || $zone[0] == 'America' || $zone[0] == 'Antarctica' || $zone[0] == 'Arctic' || $zone[0] == 'Asia' || $zone[0] == 'Atlantic' || $zone[0] == 'Australia' || $zone[0] == 'Europe' || $zone[0] == 'Indian' || $zone[0] == 'Pacific')
{
if (isset($zone[1]) != '')
{
$locations[$zone[0]][$zone[0]. '/' . $zone[1]] = str_replace('_', ' ', $zone[1]); // Creates array(DateTimeZone => 'Friendly name')
}
}
}
?>
The $locations array will contain a multi-dimensional array for each continent like
Array
(
[Africa] => Array
(
[Africa/Abidjan] => Abidjan
[Africa/Accra] => Accra
[Africa/Addis_Ababa] => Addis Ababa
[Africa/Algiers] => Algiers
...
)
[America] => Array
(
[America/Adak] => Adak
[America/Anchorage] => Anchorage
[America/Anguilla] => Anguilla
...
Please note that the timezone_identifiers_list function is not available in the most recent versions of PHP available for CentOS/RHEL as of this writing ( 5.1.6-23.2.el5_3 ).
I think the function is labeled as >= 5.1.0 in this documentation because it's possible to get the Date::Time class installed in 5.1 if you're compiling from scratch (or it's a documentation error).
I just spent a bunch of time trying to get it to work in 5.1 (installing timezonedb manually because the default PECL runs out of memory, etc.), but have decided to use a manually generated list instead. The actual timezone support seems to work fine in 5.1.
to create a list of all timezones using the code as the value, use the below:
<?php
function select_Timezone($selected = '') {
$OptionsArray = timezone_identifiers_list();
$select= '<select name="SelectContacts">';
while (list ($key, $row) = each ($OptionsArray) ){
$select .='<option value="'.$key.'"';
$select .= ($key == $selected ? ' selected' : '');
$select .= '>'.$row.'</option>';
} // endwhile;
$select.='</select>';
return $select;
}
?>
The above func takes one optional parameter which is the selected timezone, example for sydney Australia would be:
<?php
echo select_Timezone(313) . '<br>';
?>
If you wanted to just display the list (no pre-selected option):
<?php
echo select_Timezone() . '<br>';
?>
much easier to understand than the other options on this page (although not as flexible).