vendor/symfony/form/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\Form\Extension\Core\Type;
  13
  14 use Symfony\Component\Form\AbstractType;
  15 use Symfony\Component\OptionsResolver\OptionsResolverInterface;
  16
  17 class TimezoneType extends AbstractType
  18 {
  19     /**
  20      * Stores the available timezone choices
  21      * @var array
  22      */
  23     private static $timezones;
  24
  25     /**
  26      * {@inheritdoc}
  27      */
  28     public function setDefaultOptions(OptionsResolverInterface $resolver)
  29     {
  30         $resolver->setDefaults(array(
  31             'choices' => self::getTimezones(),
  32         ));
  33     }
  34
  35     /**
  36      * {@inheritdoc}
  37      */
  38     public function getParent()
  39     {
  40         return 'choice';
  41     }
  42
  43     /**
  44      * {@inheritdoc}
  45      */
  46     public function getName()
  47     {
  48         return 'timezone';
  49     }
  50
  51     /**
  52      * Returns the timezone choices.
  53      *
  54      * The choices are generated from the ICU function
  55      * \DateTimeZone::listIdentifiers(). They are cached during a single request,
  56      * so multiple timezone fields on the same page don't lead to unnecessary
  57      * overhead.
  58      *
  59      * @return array The timezone choices
  60      */
  61     public static function getTimezones()
  62     {
  63         if (null === static::$timezones) {
  64             static::$timezones = array();
  65
  66             foreach (\DateTimeZone::listIdentifiers() as $timezone) {
  67                 $parts = explode('/', $timezone);
  68
  69                 if (count($parts) > 2) {
  70                     $region = $parts[0];
  71                     $name = $parts[1].' - '.$parts[2];
  72                 } elseif (count($parts) > 1) {
  73                     $region = $parts[0];
  74                     $name = $parts[1];
  75                 } else {
  76                     $region = 'Other';
  77                     $name = $parts[0];
  78                 }
  79
  80                 static::$timezones[$region][$timezone] = str_replace('_', ' ', $name);
  81             }
  82         }
  83
  84         return static::$timezones;
  85     }
  86 }