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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\Intl;
- /**
- * Provides access to locale-related data.
- *
- * @author Bernhard Schussek <bschussek@gmail.com>
- *
- * @internal
- */
- final class Locale extends \Locale
- {
- /**
- * @var string|null
- */
- private static $defaultFallback = 'en';
- /**
- * Sets the default fallback locale.
- *
- * The default fallback locale is used as fallback for locales that have no
- * fallback otherwise.
- *
- * @param string|null $locale The default fallback locale
- *
- * @see getFallback()
- */
- public static function setDefaultFallback(?string $locale)
- {
- self::$defaultFallback = $locale;
- }
- /**
- * Returns the default fallback locale.
- *
- * @return string|null The default fallback locale
- *
- * @see setDefaultFallback()
- * @see getFallback()
- */
- public static function getDefaultFallback(): ?string
- {
- return self::$defaultFallback;
- }
- /**
- * Returns the fallback locale for a given locale.
- *
- * For example, the fallback of "fr_FR" is "fr". The fallback of "fr" is
- * the default fallback locale configured with {@link setDefaultFallback()}.
- * The default fallback locale has no fallback.
- *
- * @return string|null The ICU locale code of the fallback locale, or null
- * if no fallback exists
- */
- public static function getFallback(string $locale): ?string
- {
- if (\function_exists('locale_parse')) {
- $localeSubTags = locale_parse($locale) ?? ['language' => $locale];
- if (1 === \count($localeSubTags)) {
- if ('root' !== self::$defaultFallback && self::$defaultFallback === $localeSubTags['language']) {
- return 'root';
- }
- // Don't return default fallback for "root", "meta" or others
- // Normal locales have two or three letters
- if (\strlen($locale) < 4) {
- return self::$defaultFallback;
- }
- return null;
- }
- array_pop($localeSubTags);
- $fallback = locale_compose($localeSubTags);
- return false !== $fallback ? $fallback : null;
- }
- if (false !== $pos = strrpos($locale, '_')) {
- return substr($locale, 0, $pos);
- }
- if (false !== $pos = strrpos($locale, '-')) {
- return substr($locale, 0, $pos);
- }
- if ('root' !== self::$defaultFallback && self::$defaultFallback === $locale) {
- return 'root';
- }
- // Don't return default fallback for "root", "meta" or others
- // Normal locales have two or three letters
- return \strlen($locale) < 4 ? self::$defaultFallback : null;
- }
- /**
- * This class must not be instantiated.
- */
- private function __construct()
- {
- }
- }
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