Peter,
according to the W3C headers there are 2 ways:
* Get the date header from the browser. Use it as input for Zend_Date using
the W3C constant.
But you should note that this header can be supressed.
* Get the locale of the user and use
Zend_Locale::getTranslation/getTranslationList() to get a relation between
the full locale and the timezone. Note that the user can supress the locale
and that it is also possible that he uses only a language (f.e. en) which
would not allow to detect a language (en is supported in about 15 timezones)
* Then use again Zend_Date to get the offset between your timezone and the
detected timezone.
Again:
As the user can supress EVERY of the mentioned headers there is no 100%
perfect way of automatically detecting a users timezone.
Btw: Just to note and related to your code...
Zend_Locale::getTranslationList() returns you a localized list of
timezones... a german user would for example like to see "Mitteleuropäische
Sommerzeit" instead of "Central European Time".
Greetings
Thomas Weidner, I18N Team Leader, Zend Framework
http://www.thomasweidner.com
----- Original Message -----
From: "Peter Wansch" <[email protected]>
To: <[email protected]>
Sent: Friday, May 01, 2009 7:08 AM
Subject: Re: [fw-general] Getting the timezone from the browser's offset
Hi Thomas,
I was looking at the API doc for Zend_Date or Zend_Locale to find
something
that would return for instance America/Los_Angeles. Any pointer is much
appreciated.
Danke!!
Peter
thomasW wrote:
You can use Zend_Date or Zend_Locale for this purpose.
But it is also not problematic to realize this manually.
Greetings
Thomas Weidner, I18N Team Leader, Zend Framework
http://www.thomasweidner.com
----- Original Message -----
From: "Peter Wansch" <[email protected]>
To: <[email protected]>
Sent: Thursday, April 30, 2009 5:18 PM
Subject: [fw-general] Getting the timezone from the browser's offset
Hi,
In our application, we let users select Timezones. To render a timezone
list
we use the following view helper which works great:
class Ggv_View_Helper_TimezonesList extends Zend_View_Helper_Abstract
{
public function timezonesList($selectedzone, $label, $name =
'timezone',
$desc = '')
{
//$output = '<div class="label"><label for="' . $name .
'">'.$label.':</label></div>';
$output = '<div class="input"><select name="' . $name . '">';
$output .= $this->timezonechoice($selectedzone);
$output .= '</select>';
$output .= ' '.$desc.' </div>';
return $output;
}
protected function timezonechoice($selectedzone)
{
$all = timezone_identifiers_list();
$i = 0;
foreach($all as $zone)
{
$zone = explode('/', $zone);
$zones[$i]['continent'] = isset($zone[0]) ? $zone[0] : '';
$zones[$i]['city'] = isset($zone[1]) ? $zone[1] : '';
$zones[$i]['subcity'] = isset($zone[2]) ? $zone[2] : '';
$i++;
}
asort($zones);
$structure = '';
foreach($zones 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;
}
}
In the phtml view script we use the following which also works nicely:
<dt><label for="user_join_communityTimeZone"><?=
$this->translate('Community
Time Zone:') ?></label></dt>
In our controller, we set the user_join_communityTimezZone to:
date_default_timezone_get());
so the default is the system timezone.
Is there an (easy way) without figuring out myself from the offset
header
to
detect the most likely user timezone to avoid user error?
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