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Alphabets.php
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Alphabets.php
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<?php
namespace MediaWiki\Extension\CLDR;
use MediaWiki\MediaWikiServices;
/**
* Series of main alphabet symbols for a language, parsed from CLDR data.
* https://www.unicode.org/cldr/charts/45/by_type/core_data.alphabetic_information.html
*
* @license GPL-2.0-or-later
*/
class Alphabets {
/** @var array<string,string[]|null> */
private static array $cache = [];
/**
* Get alphabet for a locale or its fallbacks
*
* The index or main alphabet, found in CLDR main `characters.exemplarCharacters`,
* and reduced to a simple form for creating a sequence.
*
* @param string $code Locale to query. If no entry exists, the fallback
* locales are iterated.
* @return string[] a sequence of symbols
*/
public static function getIndexCharacters( string $code ): array {
$fallbacks = [
$code,
...MediaWikiServices::getInstance()->getLanguageFallback()->getAll( $code )
];
foreach ( $fallbacks as $languageCode ) {
$indexCharacters = self::loadLanguage( $languageCode );
if ( $indexCharacters ) {
return $indexCharacters;
}
}
return [];
}
/**
* Load alphabets for a particular language.
*
* @param string $code The language to return the list in
* @return string[]|null a list of characters in the language's index alphabet.
*/
private static function loadLanguage( string $code ): ?array {
if ( !array_key_exists( $code, self::$cache ) ) {
$langNameUtils = MediaWikiServices::getInstance()->getLanguageNameUtils();
if ( !$langNameUtils->isValidBuiltInCode( $code ) ) {
return null;
}
$filename = __DIR__ . '/../CldrMain/' .
$langNameUtils->getFileName( 'CldrMain', $code );
if ( file_exists( $filename ) ) {
$indexCharacters = null;
require $filename;
self::$cache[$code] = $indexCharacters;
} else {
wfDebug( __METHOD__ . ": Unable to load alphabet for $filename\n" );
}
}
return self::$cache[$code] ?? null;
}
}

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Aug 15 2026, 14:00 (12 w, 3 d ago)
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Alphabets.php (1 KB)

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