language detection library

1 files changed, 341 insertions, 0 deletions

diff --git a/library/langdet/Text/LanguageDetect/ISO639.php b/library/langdet/Text/LanguageDetect/ISO639.php
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+++ b/library/langdet/Text/LanguageDetect/ISO639.php
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+<?php
+/**
+ * Part of Text_LanguageDetect
+ *
+ * PHP version 5
+ *
+ * @category  Text
+ * @package   Text_LanguageDetect
+ * @author    Christian Weiske <cweiske@php.net>
+ * @copyright 2011 Christian Weiske <cweiske@php.net>
+ * @license   http://www.debian.org/misc/bsd.license BSD
+ * @version   SVN: $Id$
+ * @link      http://pear.php.net/package/Text_LanguageDetect/
+ */
+
+/**
+ * Provides a mapping between the languages from lang.dat and the
+ * ISO 639-1 and ISO-639-2 codes.
+ *
+ * Note that this class contains only languages that exist in lang.dat.
+ *
+ * @category  Text
+ * @package   Text_LanguageDetect
+ * @author    Christian Weiske <cweiske@php.net>
+ * @copyright 2011 Christian Weiske <cweiske@php.net>
+ * @license   http://www.debian.org/misc/bsd.license BSD
+ * @link      http://www.loc.gov/standards/iso639-2/php/code_list.php
+ */
+class Text_LanguageDetect_ISO639
+{
+    /**
+     * Maps all language names from the language database to the
+     * ISO 639-1 2-letter language code.
+     *
+     * NULL indicates that there is no 2-letter code.
+     *
+     * @var array
+     */
+    public static $nameToCode2 = array(
+        'albanian'   => 'sq',
+        'arabic'     => 'ar',
+        'azeri'      => 'az',
+        'bengali'    => 'bn',
+        'bulgarian'  => 'bg',
+        'cebuano'    => null,
+        'croatian'   => 'hr',
+        'czech'      => 'cs',
+        'danish'     => 'da',
+        'dutch'      => 'nl',
+        'english'    => 'en',
+        'estonian'   => 'et',
+        'farsi'      => 'fa',
+        'finnish'    => 'fi',
+        'french'     => 'fr',
+        'german'     => 'de',
+        'hausa'      => 'ha',
+        'hawaiian'   => null,
+        'hindi'      => 'hi',
+        'hungarian'  => 'hu',
+        'icelandic'  => 'is',
+        'indonesian' => 'id',
+        'italian'    => 'it',
+        'kazakh'     => 'kk',
+        'kyrgyz'     => 'ky',
+        'latin'      => 'la',
+        'latvian'    => 'lv',
+        'lithuanian' => 'lt',
+        'macedonian' => 'mk',
+        'mongolian'  => 'mn',
+        'nepali'     => 'ne',
+        'norwegian'  => 'no',
+        'pashto'     => 'ps',
+        'pidgin'     => null,
+        'polish'     => 'pl',
+        'portuguese' => 'pt',
+        'romanian'   => 'ro',
+        'russian'    => 'ru',
+        'serbian'    => 'sr',
+        'slovak'     => 'sk',
+        'slovene'    => 'sl',
+        'somali'     => 'so',
+        'spanish'    => 'es',
+        'swahili'    => 'sw',
+        'swedish'    => 'sv',
+        'tagalog'    => 'tl',
+        'turkish'    => 'tr',
+        'ukrainian'  => 'uk',
+        'urdu'       => 'ur',
+        'uzbek'      => 'uz',
+        'vietnamese' => 'vi',
+        'welsh'      => 'cy',
+    );
+
+    /**
+     * Maps all language names from the language database to the
+     * ISO 639-2 3-letter language code.
+     *
+     * @var array
+     */
+    public static $nameToCode3 = array(
+        'albanian'   => 'sqi',
+        'arabic'     => 'ara',
+        'azeri'      => 'aze',
+        'bengali'    => 'ben',
+        'bulgarian'  => 'bul',
+        'cebuano'    => 'ceb',
+        'croatian'   => 'hrv',
+        'czech'      => 'ces',
+        'danish'     => 'dan',
+        'dutch'      => 'nld',
+        'english'    => 'eng',
+        'estonian'   => 'est',
+        'farsi'      => 'fas',
+        'finnish'    => 'fin',
+        'french'     => 'fra',
+        'german'     => 'deu',
+        'hausa'      => 'hau',
+        'hawaiian'   => 'haw',
+        'hindi'      => 'hin',
+        'hungarian'  => 'hun',
+        'icelandic'  => 'isl',
+        'indonesian' => 'ind',
+        'italian'    => 'ita',
+        'kazakh'     => 'kaz',
+        'kyrgyz'     => 'kir',
+        'latin'      => 'lat',
+        'latvian'    => 'lav',
+        'lithuanian' => 'lit',
+        'macedonian' => 'mkd',
+        'mongolian'  => 'mon',
+        'nepali'     => 'nep',
+        'norwegian'  => 'nor',
+        'pashto'     => 'pus',
+        'pidgin'     => 'crp',
+        'polish'     => 'pol',
+        'portuguese' => 'por',
+        'romanian'   => 'ron',
+        'russian'    => 'rus',
+        'serbian'    => 'srp',
+        'slovak'     => 'slk',
+        'slovene'    => 'slv',
+        'somali'     => 'som',
+        'spanish'    => 'spa',
+        'swahili'    => 'swa',
+        'swedish'    => 'swe',
+        'tagalog'    => 'tgl',
+        'turkish'    => 'tur',
+        'ukrainian'  => 'ukr',
+        'urdu'       => 'urd',
+        'uzbek'      => 'uzb',
+        'vietnamese' => 'vie',
+        'welsh'      => 'cym',
+    );
+
+    /**
+     * Maps ISO 639-1 2-letter language codes to the language names
+     * in the language database
+     *
+     * Not all languages have a 2 letter code, so some are missing
+     *
+     * @var array
+     */
+    public static $code2ToName = array(
+        'ar' => 'arabic',
+        'az' => 'azeri',
+        'bg' => 'bulgarian',
+        'bn' => 'bengali',
+        'cs' => 'czech',
+        'cy' => 'welsh',
+        'da' => 'danish',
+        'de' => 'german',
+        'en' => 'english',
+        'es' => 'spanish',
+        'et' => 'estonian',
+        'fa' => 'farsi',
+        'fi' => 'finnish',
+        'fr' => 'french',
+        'ha' => 'hausa',
+        'hi' => 'hindi',
+        'hr' => 'croatian',
+        'hu' => 'hungarian',
+        'id' => 'indonesian',
+        'is' => 'icelandic',
+        'it' => 'italian',
+        'kk' => 'kazakh',
+        'ky' => 'kyrgyz',
+        'la' => 'latin',
+        'lt' => 'lithuanian',
+        'lv' => 'latvian',
+        'mk' => 'macedonian',
+        'mn' => 'mongolian',
+        'ne' => 'nepali',
+        'nl' => 'dutch',
+        'no' => 'norwegian',
+        'pl' => 'polish',
+        'ps' => 'pashto',
+        'pt' => 'portuguese',
+        'ro' => 'romanian',
+        'ru' => 'russian',
+        'sk' => 'slovak',
+        'sl' => 'slovene',
+        'so' => 'somali',
+        'sq' => 'albanian',
+        'sr' => 'serbian',
+        'sv' => 'swedish',
+        'sw' => 'swahili',
+        'tl' => 'tagalog',
+        'tr' => 'turkish',
+        'uk' => 'ukrainian',
+        'ur' => 'urdu',
+        'uz' => 'uzbek',
+        'vi' => 'vietnamese',
+    );
+
+    /**
+     * Maps ISO 639-2 3-letter language codes to the language names
+     * in the language database.
+     *
+     * @var array
+     */
+    public static $code3ToName = array(
+        'ara' => 'arabic',
+        'aze' => 'azeri',
+        'ben' => 'bengali',
+        'bul' => 'bulgarian',
+        'ceb' => 'cebuano',
+        'ces' => 'czech',
+        'crp' => 'pidgin',
+        'cym' => 'welsh',
+        'dan' => 'danish',
+        'deu' => 'german',
+        'eng' => 'english',
+        'est' => 'estonian',
+        'fas' => 'farsi',
+        'fin' => 'finnish',
+        'fra' => 'french',
+        'hau' => 'hausa',
+        'haw' => 'hawaiian',
+        'hin' => 'hindi',
+        'hrv' => 'croatian',
+        'hun' => 'hungarian',
+        'ind' => 'indonesian',
+        'isl' => 'icelandic',
+        'ita' => 'italian',
+        'kaz' => 'kazakh',
+        'kir' => 'kyrgyz',
+        'lat' => 'latin',
+        'lav' => 'latvian',
+        'lit' => 'lithuanian',
+        'mkd' => 'macedonian',
+        'mon' => 'mongolian',
+        'nep' => 'nepali',
+        'nld' => 'dutch',
+        'nor' => 'norwegian',
+        'pol' => 'polish',
+        'por' => 'portuguese',
+        'pus' => 'pashto',
+        'rom' => 'romanian',
+        'rus' => 'russian',
+        'slk' => 'slovak',
+        'slv' => 'slovene',
+        'som' => 'somali',
+        'spa' => 'spanish',
+        'sqi' => 'albanian',
+        'srp' => 'serbian',
+        'swa' => 'swahili',
+        'swe' => 'swedish',
+        'tgl' => 'tagalog',
+        'tur' => 'turkish',
+        'ukr' => 'ukrainian',
+        'urd' => 'urdu',
+        'uzb' => 'uzbek',
+        'vie' => 'vietnamese',
+    );
+
+    /**
+     * Returns the 2-letter ISO 639-1 code for the given language name.
+     *
+     * @param string $lang English language name like "swedish"
+     *
+     * @return string Two-letter language code (e.g. "sv") or NULL if not found
+     */
+    public static function nameToCode2($lang)
+    {
+        $lang = strtolower($lang);
+        if (!isset(self::$nameToCode2[$lang])) {
+            return null;
+        }
+        return self::$nameToCode2[$lang];
+    }
+
+    /**
+     * Returns the 3-letter ISO 639-2 code for the given language name.
+     *
+     * @param string $lang English language name like "swedish"
+     *
+     * @return string Three-letter language code (e.g. "swe") or NULL if not found
+     */
+    public static function nameToCode3($lang)
+    {
+        $lang = strtolower($lang);
+        if (!isset(self::$nameToCode3[$lang])) {
+            return null;
+        }
+        return self::$nameToCode3[$lang];
+    }
+
+    /**
+     * Returns the language name for the given 2-letter ISO 639-1 code.
+     *
+     * @param string $code Two-letter language code (e.g. "sv")
+     *
+     * @return string English language name like "swedish"
+     */
+    public static function code2ToName($code)
+    {
+        $lang = strtolower($code);
+        if (!isset(self::$code2ToName[$code])) {
+            return null;
+        }
+        return self::$code2ToName[$code];
+    }
+
+    /**
+     * Returns the language name for the given 3-letter ISO 639-2 code.
+     *
+     * @param string $code Three-letter language code (e.g. "swe")
+     *
+     * @return string English language name like "swedish"
+     */
+    public static function code3ToName($code)
+    {
+        $lang = strtolower($code);
+        if (!isset(self::$code3ToName[$code])) {
+            return null;
+        }
+        return self::$code3ToName[$code];
+    }
+}
+
+?>
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