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POPHP Timezone List
 

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    <p>I am looking for a way to generate a list of timezones for display in a <code>&lt;select&gt;</code> <a href="https://stackoverflow.com/questions/1727077/generating-a-drop-down-list-of-timezones-with-php/2839396#2839396">Generating a drop down list of timezones with PHP</a> </p> <pre><code> $list = DateTimeZone::listAbbreviations(); $idents = DateTimeZone::listIdentifiers(); $data = $offset = $added = array(); foreach ($list as $abbr =&gt; $info) { foreach ($info as $zone) { if ( ! empty($zone['timezone_id']) AND ! in_array($zone['timezone_id'], $added) AND in_array($zone['timezone_id'], $idents)) { $z = new DateTimeZone($zone['timezone_id']); $c = new DateTime(null, $z); $zone['time'] = $c-&gt;format('H:i a'); $data[] = $zone; $offset[] = $z-&gt;getOffset($c); $added[] = $zone['timezone_id']; } } } array_multisort($offset, SORT_ASC, $data); $options = array(); foreach ($data as $key =&gt; $row) { $options[$row['timezone_id']] = $row['time'] . ' - ' . formatOffset($row['offset']) . ' ' . $row['timezone_id']; } // now you can use $options; function formatOffset($offset) { $hours = $offset / 3600; $remainder = $offset % 3600; $sign = $hours &gt; 0 ? '+' : '-'; $hour = (int) abs($hours); $minutes = (int) abs($remainder / 60); if ($hour == 0 AND $minutes == 0) { $sign = ' '; } return 'GMT' . $sign . str_pad($hour, 2, '0', STR_PAD_LEFT) .':'. str_pad($minutes,2, '0'); } </code></pre> <p>When I checked my country, the offset was wrong, I am in Asia/Singapore, it should be UTC/GMT +8 <a href="http://www.timeanddate.com/worldclock/city.html?n=236" rel="nofollow noreferrer">http://www.timeanddate.com/worldclock/city.html?n=236</a> but according to the generated list its +9. Is there some kind of logic error? The time was correct tho</p> <p>Is there a better way to generate this list? from the same question in the link above, </p> <pre><code>static $regions = array( 'Africa' =&gt; DateTimeZone::AFRICA, 'America' =&gt; DateTimeZone::AMERICA, 'Antarctica' =&gt; DateTimeZone::ANTARCTICA, 'Aisa' =&gt; DateTimeZone::ASIA, 'Atlantic' =&gt; DateTimeZone::ATLANTIC, 'Europe' =&gt; DateTimeZone::EUROPE, 'Indian' =&gt; DateTimeZone::INDIAN, 'Pacific' =&gt; DateTimeZone::PACIFIC ); foreach ($regions as $name =&gt; $mask) { $tzlist[] = DateTimeZone::listIdentifiers($mask); } </code></pre> <p>This just gets the identifiers I want a friendly display name eg. UTC+8 Asia/Singapore or something similar. How can I get that?</p>
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