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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace core;
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/**
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* Helper utility to interact with Locales.
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*
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* @package core
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* @copyright 2024 Andrew Lyons <andrew@nicols.co.uk>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class locale {
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/**
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* Wrap for the native PHP function setlocale().
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*
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* @param int $category Specifying the category of the functions affected by the locale setting.
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* @param string $locale E.g.: en_AU.utf8, en_GB.utf8, es_ES.utf8, fr_FR.utf8, de_DE.utf8.
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* @return string|false Returns the new current locale, or FALSE on error.
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*/
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public static function set_locale(int $category = LC_ALL, string $locale = '0'): string|false {
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if (strlen($locale) <= 255 || PHP_OS_FAMILY === 'BSD' || PHP_OS_FAMILY === 'Darwin') {
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// We can set the whole locale all together.
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return setlocale($category, $locale);
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}
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// Too long locale with linux or windows, let's split it into known and supported categories.
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$split = explode(';', self::standardise_locale($locale));
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foreach ($split as $element) {
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[$category, $value] = explode('=', $element);
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if (defined($category)) { // Only if the category exists, there are OS differences.
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setlocale(constant($category), $value);
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}
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}
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// Finally, return the complete configured locale.
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return self::get_locale();
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}
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/**
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* Get the current locale.
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*
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* @param int $category
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* @return string|false
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*/
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public static function get_locale(int $category = LC_ALL): string|false {
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return setlocale($category, "0");
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}
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/**
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* Standardise a string-based locale, removing any deprecated locale categories and ordering it.
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*
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* @param string $locale
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* @return string
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*/
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public static function standardise_locale(string $locale): string {
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$locales = array_filter(
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explode(';', $locale),
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function ($locale): bool {
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[$category, ] = explode('=', $locale);
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return defined($category);
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},
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);
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sort($locales);
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return implode(';', $locales);
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}
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}
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