<?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\Form\ChoiceList\ArrayChoiceList;use Symfony\Component\Form\ChoiceList\Loader\ChoiceLoaderInterface;use Symfony\Component\Intl\Intl;use Symfony\Component\OptionsResolver\Options;use Symfony\Component\OptionsResolver\OptionsResolver;class CountryType extends AbstractType implements ChoiceLoaderInterface{ /** * Country loaded choice list. * * The choices are lazy loaded and generated from the Intl component. * * {@link \Symfony\Component\Intl\Intl::getRegionBundle()}. * * @var ArrayChoiceList */ private $choiceList; /** * {@inheritdoc} */ public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults([ 'choice_loader' => function (Options $options) { if ($options['choices']) { @trigger_error(sprintf('Using the "choices" option in %s has been deprecated since Symfony 3.3 and will be ignored in 4.0. Override the "choice_loader" option instead or set it to null.', __CLASS__), E_USER_DEPRECATED); return null; } return $this; }, 'choice_translation_domain' => false, ]); } /** * {@inheritdoc} */ public function getParent() { return __NAMESPACE__.'\ChoiceType'; } /** * {@inheritdoc} */ public function getBlockPrefix() { return 'country'; } /** * {@inheritdoc} */ public function loadChoiceList($value = null) { if (null !== $this->choiceList) { return $this->choiceList; } return $this->choiceList = new ArrayChoiceList(array_flip(Intl::getRegionBundle()->getCountryNames()), $value); } /** * {@inheritdoc} */ public function loadChoicesForValues(array $values, $value = null) { // Optimize $values = array_filter($values); if (empty($values)) { return []; } return $this->loadChoiceList($value)->getChoicesForValues($values); } /** * {@inheritdoc} */ public function loadValuesForChoices(array $choices, $value = null) { // Optimize $choices = array_filter($choices); if (empty($choices)) { return []; } // If no callable is set, choices are the same as values if (null === $value) { return $choices; } return $this->loadChoiceList($value)->getValuesForChoices($choices); }}