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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form\Extension\Core\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class TimezoneType extends AbstractType
{
/**
* Stores the available timezone choices
* @var array
*/
private static $timezones;
/**
* {@inheritdoc}
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'choices' => self::getTimezones(),
));
}
/**
* {@inheritdoc}
*/
public function getParent()
{
return 'choice';
}
/**
* {@inheritdoc}
*/
public function getName()
{
return 'timezone';
}
/**
* Returns the timezone choices.
*
* The choices are generated from the ICU function
* \DateTimeZone::listIdentifiers(). They are cached during a single request,
* so multiple timezone fields on the same page don't lead to unnecessary
* overhead.
*
* @return array The timezone choices
*/
public static function getTimezones()
{
if (null === static::$timezones) {
static::$timezones = array();
foreach (\DateTimeZone::listIdentifiers() as $timezone) {
$parts = explode('/', $timezone);
if (count($parts) > 2) {
$region = $parts[0];
$name = $parts[1].' - '.$parts[2];
} elseif (count($parts) > 1) {
$region = $parts[0];
$name = $parts[1];
} else {
$region = 'Other';
$name = $parts[0];
}
static::$timezones[$region][$timezone] = str_replace('_', ' ', $name);
}
}
return static::$timezones;
}
}
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