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@@ -0,0 +1,112 @@
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+<?php
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+// Functions for internationalization
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+
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+/**
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+ * Translates string to given language in first parameter, key given in second parameter (dynamically loads required language). Works like spritf from second parameter
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+ * @global array $LANG Associative array of language pharses
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+ * @return string Translated string
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+ */
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+function _translate() {
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+ global $LANG;
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+
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+ $args = func_get_args();
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+ $l = $args[0];
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+
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+ if (!$l) return 'NO LANGUAGE DEFINED';
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+ $key = $args[1];
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+
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+ if (!isset($LANG[$l])) {
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+ require_once($_SERVER['DOCUMENT_ROOT'].'/inc/i18n/'.$l.'.php');
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+ }
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+
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+ if (!isset($LANG[$l][$key])) {
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+ $text=$key;
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+ } else {
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+ $text=$LANG[$l][$key];
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+ }
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+
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+ array_shift($args);
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+ if (count($args)>1) {
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+ $args[0] = $text;
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+ return call_user_func_array("sprintf",$args);
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+ } else {
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+ return $text;
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+ }
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+}
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+
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+/**
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+ * Translates string by a given key in first parameter to current session language. Works like sprintf
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+ * @global array $LANG Associative array of language pharses
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+ * @return string Translated string
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+ * @see _translate()
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+ */
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+function __() {
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+ $args = func_get_args();
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+ array_unshift($args,$_SESSION['language']);
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+ return call_user_func_array("_translate",$args);
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+}
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+
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+/**
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+ * Detects user language from Accept-Language HTTP header.
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+ * @param string Fallback language (default: 'en')
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+ * @return string Language code (such as 'en' and 'ja')
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+ */
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+function detect_user_language($fallback='en') {
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+ static $user_lang = '';
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+
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+ // Already detected
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+ if (!empty($user_lang)) return $user_lang;
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+
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+ // Check if Accept-Language header is available
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+ if (!isset($_SERVER) ||
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+ !isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) ||
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+ !is_string($_SERVER['HTTP_ACCEPT_LANGUAGE'])
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+ ) {
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+ // Store result for reusing
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+ $user_lang = $fallback;
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+ return $user_lang;
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+ }
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+
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+ // Sort Accept-Language by `q` value
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+ $accept_langs = explode(',', preg_replace('/\s/', '', strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE'])));
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+ $accept_langs_sorted = [];
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+ foreach ($accept_langs as $lang) {
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+ $div = explode(';q=', $lang, 2);
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+ if (count($div) < 2) {
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+ // `q` value was not specfied
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+ // -> Set default `q` value (1)
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+ $div[] = '1';
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+ }
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+ list($code, $q) = $div;
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+ if (preg_match('/^[\w\-]+$/', $code)) {
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+ // Acceptable language code
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+ $accept_langs_sorted[$code] = (double)$q;
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+ }
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+ }
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+ arsort($accept_langs_sorted);
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+
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+ // List languages
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+ exec (VESTA_CMD."v-list-sys-languages json", $output, $return_var);
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+ $languages = json_decode(implode('', $output), true);
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+ unset($output);
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+
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+ // Find best matching language
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+ foreach ($accept_langs_sorted as $user_lang => $dummy) {
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+ $decision = '';
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+ foreach ($languages as $prov_lang) {
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+ if (strlen($decision) > strlen($prov_lang)) continue;
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+ if (strpos($user_lang, $prov_lang) !== false) {
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+ $decision = $prov_lang;
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+ }
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+ }
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+ if (!empty($decision)) {
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+ // Store result for reusing
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+ $user_lang = $decision;
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+ return $user_lang;
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+ }
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+ }
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+
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+ // Store result for reusing
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+ $user_lang = $fallback;
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+ return $user_lang;
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+}
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Serghey Rodin