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Working code by Gatan Frenoy to allow texts to contain multiple languages!
See: http://moodle.org/mod/forum/discuss.php?d=2760
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filter/multilang/README.txt
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50
filter/multilang/README.txt
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///////////////////////////////////////////////////////////////////////////
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// This program is part of Moodle - Modular Object-Oriented Dynamic //
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// Learning Environment - http://moodle.com //
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// //
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// Multilingual Filter //
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// $Id$ //
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// //
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///////////////////////////////////////////////////////////////////////////
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This filter implements an XML syntax to provide
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fully multilingual website. No only the Moodle interface
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can be translated but also the content!
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To activate this filter, add a line like this to your
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config.php:
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$CFG->textfilter1 = 'filter/multilang/multilang.php';
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Syntax to display a multilingual content:
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<lang lang="en" format="auto">
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Introduction
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</lang>
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<lang lang="es" format="auto">
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Introducción
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</lang>
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<lang lang="de" format="auto">
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Einleitung
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</lang>
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///////////////////////////////////////////////////////////////////////////
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// //
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// Copyright (C) 2004 Gaëtan Frenoy <gaetan à frenoy.net> //
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// //
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// This program 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 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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174
filter/multilang/multilang.php
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filter/multilang/multilang.php
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<?php
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///////////////////////////////////////////////////////////////////////////
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// //
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// This program is part of Moodle - Modular Object-Oriented Dynamic //
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// Learning Environment - http://moodle.com //
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// //
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// $Id$ //
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// //
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// Copyright (C) 2004 Gaëtan Frenoy <gaetan à frenoy.net> //
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// //
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// This program 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 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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// //
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// See README.txt for more information about this module //
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// //
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///////////////////////////////////////////////////////////////////////////
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/// These lines are important - the variable must match the name
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/// of the actual function below
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$textfilter_function = 'multilang_filter';
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if (function_exists($textfilter_function)) {
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return;
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}
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/// Given XML multilinguage text, return relevant text according to
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/// current language. i.e.=
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/// - look for lang sections in the code.
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/// - if there exists texts in the currently active language, print them.
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/// - else, if there exists texts in the current parent language, print them.
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/// - else, if there are English texts, print them
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/// - else, print everything.
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///
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/// $text is raw unmodified user text
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function multilang_filter($courseid, $text) {
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/// Do a quick check using stripos to avoid unnecessary work
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if (stripos($text, '<lang') === false) {
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return $text;
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}
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/// Get current language
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$currentlanguage = current_language();
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/// Strip all spaces between tags
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$text = eregi_replace(">"."[[:space:]]+"."<","><", $text);
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$text = eregi_replace("&", "&", $text);
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/// Parse XML multilingual file
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$xml = new XMLParser($text);
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$text = $xml->texts['en'];
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foreach ($xml->texts as $lang => $lang_text) {
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if ($lang == $currentlanguage) $text = $lang_text;
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}
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return $text;
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}
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/// XML Parser for Multilingual text
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/// Search for "<LANG>" tags and stores inner xml into $this->texts[lang]
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///
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class XMLParser {
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/// Currently parsed language
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var $current_lang = NULL;
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/// Currently parsed format
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var $current_format = NULL;
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/// Currently parsed text
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var $current_text = NULL;
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/// List of parsed texts so far
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var $texts = NULL;
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/// Constructor
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function XMLParser($data) {
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/// Init member variables
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$this->current_lang = NULL;
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$this->current_format = NULL;
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$this->current_text = '';
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$this->texts = array();
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/// Default text for default language is input data
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$this->texts['en'] = $data;
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/// Create parser
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$xml_parser = xml_parser_create();
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xml_set_object($xml_parser, &$this);
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xml_set_element_handler($xml_parser, 'startElement', 'endElement');
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xml_set_character_data_handler($xml_parser, 'characterData');
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/// Parse date (embed data around dummy tag so parser will receive
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/// a complete XML document
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if (!xml_parse($xml_parser, '<moodle_xml_text_20040116>'.$data.'</moodle_xml_text_20040116>', true))
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{
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/*
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die(sprintf("XML error: %s at line %d",
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xml_error_string(xml_get_error_code($xml_parser)),
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xml_get_current_line_number($xml_parser)));
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*/
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}
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/// Free resource
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xml_parser_free($xml_parser);
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}
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/// Callback on start of an XML element
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function startElement($parser, $tag, $attributeList) {
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if ($tag == 'LANG' && is_null($this->current_lang))
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{
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// <LANG> tag found, initialise current member vars
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// default language is 'en'
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$this->current_lang = array_key_exists("LANG", $attributeList)?strtolower($attributeList['LANG']):'en';
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// default format is 'auto'
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$this->current_format = array_key_exists('FORMAT', $attributeList)?strtolower($attributeList['FORMAT']):'auto';
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// init inner xml
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$this->current_text = '';
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}
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elseif (!is_null($this->current_lang))
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{
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// If a language has been found already, process tag and attributes
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// and add it to inner xml for current language
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$this->current_text .= "<{$tag}";
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foreach ($attributeList as $key => $val) {
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$this->current_text .= " {$key}=\"{$val}\"";
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}
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$this->current_text .= ">";
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}
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else {
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// This code is outside any <LANG> tag, text is probably not
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// a valid multilingual format
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}
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}
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/// Callback on end of an XML element
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function endElement($parser, $tag) {
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if ($tag == 'LANG' && !is_null($this->current_lang)) {
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// <LANG> tag found while <LANG> tag was already open,
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// store inner xml and reset context
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$this->texts[$this->current_lang] = $this->current_text;
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$this->current_text = '';
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$this->current_lang = NULL;
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$this->current_format = NULL;
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}
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elseif (!is_null($this->current_lang)) {
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// If a language has been found already, process tag
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// and add it to inner xml for current language
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$this->current_text .= "</{$tag}>";
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}
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else {
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// This code is outside any <LANG> tag, text is probably not
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// a valid multilingual format
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}
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}
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/// Callback on character data
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function characterData($parser, $data) {
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// Process inner text and add it to current inner xml
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$this->current_text .= $data;
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}
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}
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?>
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