how to create timezone select menu using PHP

[aHMAD_SQaLli]

Hello

How can I create a user friendly timezone select menu using PHP, like the one in General account setting of PHPFreaks.

thanks !

[Barand]

Create a database table of the timezones and build it using that

 

http://timezonedb.com/download

[Barand]

Forget that. You can use

$tz_array = timezone_identifiers_list();
echo '<pre>',print_r($tz_array, true),'</pre>';

[aHMAD_SQaLli]

Thanks, again

one more thing, what can I add to the code to display the time offsets, like :  (GMT +1:00 hours ) Brussels, Paris ... ?

.

[Barand]

perhaps

$arr = timezone_identifiers_list();

foreach ($arr as $tz) {
    if (strpos($tz, '/')===false ) continue;
    list ($region, $city) = explode('/', $tz, 2);
    $d = new DateTimeZone($tz);
    $secs = $d->getOffset(new DateTime());
    $offset = number_format($secs/3600, 2);
    $tzArray[$offset][$region][] = $city;
}

ksort($tzArray);

$menu = "<option value=''>- select timezone -</option>\n";
foreach ($tzArray as $o => $regzones) {
    $menu .= sprintf("<optgroup label='GMT %+0.2f'>\n", $o);
    ksort($regzones);
    foreach ($regzones as $region => $cities) {
        foreach ($cities as $city)
            $menu .= "<option >$region/$city</option>\n";
    }
    $menu .= "</optgroup>\n";
} 
?>
<select name='tzone'>
    <?=$menu?>
</select>

[aHMAD_SQaLli]

Awesome, Thank you so much sir !

[Barand]

Alternative version if you prefer to group the timezones in the menu by region

$arr = timezone_identifiers_list();
$now = new DateTime();

foreach ($arr as $tz) {
    if (strpos($tz, '/')===false ) continue;
    list ($region, $city) = explode('/', $tz, 2);
    $d = new DateTimeZone($tz);
    $secs = $d->getOffset($now);
    $offset = number_format($secs/3600, 2);
    $tzArray[$region][$offset][] = $city;
}

ksort($tzArray);

$menu = "<option value=''>- select timezone -</option>\n";
foreach ($tzArray as $region => $regzones) {
    $menu .= sprintf("<optgroup label='%s'>\n", $region);
    ksort($regzones);
    foreach ($regzones as $o => $cities) {
        foreach ($cities as $city)
            $menu .= sprintf("<option value='$region/$city'>GMT%+0.2f $region/$city</option>\n", $o);
    }
    $menu .= "</optgroup>\n";
} 
?>
<select name='tzone'>
    <?=$menu?>
</select>