timezone_identifiers

范例

例 1. A timezone_identifiers_list() example


<?php
$timezone_identifiers = DateTimeZone::listIdentifiers();
for ($i=0; $i < 5; $i++) {
    echo "$timezone_identifiers[$i]\n";
}
?>

上例的输出类似于：

Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmera

add a note User Contributed Notes

spam1 at dyden dot de
04-Jul-2007 01:22


Hi!

Since many are going to use these timezones for saving their users' timezones, I wrote a little something that builds the select-field for this purpose and removes the "Others" that are not supposed to be used.

Note that <optgroup> is not widely supported and causes a bug in Opera 6.

I know this is easy to do, but you need to examine the timezones first (for example to remember that Istanbul is in the category for two continents - of course).



<select name="timezonechoice" size="10"><?php

function timezonechoice($selectedzone) {

    $all = timezone_identifiers_list();

    $i = 0;

    foreach($all AS $zone) {

        $zone = explode('/',$zone);

        $zonen[$i]['continent'] = $zone[0];

        $zonen[$i]['city'] = $zone[1];

        $i++;

        }

    asort($zonen);

    foreach($zonen AS $zone) {

    extract($zone);

        if($continent == 'Africa' OR $continent == 'America' OR $continent == 'Antarctica' OR $continent == 'Arctic' OR $continent == 'Asia' OR $continent == 'Atlantic' OR $continent == 'Australia' OR $continent == 'Europe' OR $continent == 'Indian' OR $continent == 'Pacific') {

            if(!isset($letztercontinent)) $structure .= '

<optgroup label="'.$continent.'">'; // continent

            elseif($letztercontinent!=$continent) $structure .= '</optgroup>

<optgroup label="'.$continent.'">'; // continent

            if($city!='') $structure .= "

<option ".((($continent.'/'.$city)==$selectedzone)?'selected="selected "':'')." value=\"".($continent.'/'.$city)."\">".str_replace('_',' ',$city)."</option>"; //Timezone

            else $structure .= "

<option ".(($continent==$selectedzone)?'selected="selected "':'')." value=\"".$continent."\">".$continent."</option>"; //Timezone

            $letztercontinent = $continent;

            }

        }

    $structure .= '

</optgroup>';

    return $structure;

    }

echo timezonechoice('Europe/Berlin');

?></select>



Hope this saves someone some effort.

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timezone_identifiers_list

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