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<?php
#########################################################
# LANGUAGE FUNCTIONS
// global vars, should only be accessed through Lang class
$_lang_possible = null; // array of possible language codes
$_lang_possible_map = null; // array of possible codes => full name
$_lang_priorities = null; // array of language codes, ordered by priority
$_lang_default = ''; // fallback default lang code
$_lang_map = array( // map codes to full names
'de' => 'Deutsch',
'en' => 'English',
'el' => 'ελληνικά',
'es' => 'Español',
'fr' => 'Français',
'it' => 'Italiano',
'pt' => 'Português',
);
class Lang {
// returns the top choice language
function top() {global $_lang_priorities; return $_lang_priorities[0];}
// sets the current language setting
function set($language) {if (isset($language) && $language != '') $_SESSION['lang'] = $language;}
// init: called very early in frontdoor.php
function init($default, $possible) {
global $_lang_default, $_lang_possible, $_lang_possible_map, $_lang_map;
$_lang_default = $default;
$_lang_possible = $possible;
$_lang_possible_map = array();
foreach($_lang_possible as $code) {
if (isset($_lang_map[$code])) $_lang_possible_map[$code] = $_lang_map[$code];
}
}
/**
* returns language priorities, and updates them if necesssary.
**/
function priority() {
global $_lang_priorities, $_lang_possible, $_lang_default;
$languages = &$_lang_priorities;
if ( ! isset($languages) ) {
// start with what the browser wants
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
$languages = split("," , preg_replace('/(;q=\d+.\d+)|(\-..)| /i', '', $_SERVER['HTTP_ACCEPT_LANGUAGE']) );
else
$languages = array();
// if session defines a language, put it in first place
if ( isset( $_SESSION['lang'] ) )
array_unshift( $languages, $_SESSION['lang'] );
// remove languages which are not allowed in the site configuration
if (is_array($_lang_possible) && count($_lang_possible)) {
$languages = array_intersect($_lang_possible, $languages);
}
// Just in case we have no other languages, set a default.
$languages[] = $_lang_default;
// remove duplicates and make sure indexes are sequential.
$languages = array_values(array_unique($languages));
}
// if session lang is set, make sure it is our 'highest' priority language.
// we do this every time, not just the first time, in case it has changed.
if ( isset($_SESSION['lang']) && $_SESSION['lang'] != $languages[0]) {
array_unshift( $languages, $_SESSION['lang'] );
$languages = array_values(array_unique($languages));
}
// if there is no session yet, set the session language to the top choice.
if (! isset($_SESSION['lang']) ) {
$_SESSION['lang'] = $languages[0];
}
return $languages;
}
// returns a form for selecting the language.
function getform($action, $extra='') {
global $_lang_possible_map;
$html = "<form action=\"$action\" method=\"get\">\n";
$html .= $extra;
$html .= "<select name=\"lang\" onchange=\"this.form.submit();\">\n";
foreach ($_lang_possible_map as $lcode => $lname) {
$selected = $lcode == $_SESSION['lang'] ? "SELECTED" : "";
$html .= "<option value=\"$lcode\" $selected>$lname</option>\n";
}
$html .= "</select>\n</form>\n";
return $html;
}
}
return;
?>
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