I got this code from a tutorial that I can't find now for some reason to localize my web page. It is the best example I've still at the moment. I modified it a little bit thanks to the collaboration of users from Stack Overflow.
The localization files should basically do the following things:
They don't have to detect the preferred langue in the user's browser (I think there still code inside that does that).
Save cookies so that the second time that the user comes back he or she will see the same language.
Use the preferred language though the session (even if you click other sections you still see the preferred language.
Inside the code there's some comments that talks about user login and other stuff. I would like to remove that but I'm afraid of messing up the code.
I'm not very good with PHP. Any suggestions to remove unnecessary code?
lang.php:
<?php
function dlang($Var) {
if(empty($GLOBALS[$Var])) {
$GLOBALS[$Var]=(!empty($GLOBALS['_SERVER'][$Var]))?
$GLOBALS['_SERVER'][$Var]:
(!empty($GLOBALS['HTTP_SERVER_VARS'][$Var]))?
$GLOBALS['HTTP_SERVER_VARS'][$Var]:'';
}
}
function language() {
// Detect HTTP_ACCEPT_LANGUAGE & HTTP_USER_AGENT.
dlang('HTTP_ACCEPT_LANGUAGE');
dlang('HTTP_USER_AGENT');
$_AL=strtolower($GLOBALS['HTTP_ACCEPT_LANGUAGE']);
$_UA=strtolower($GLOBALS['HTTP_USER_AGENT']);
// Try to detect Primary language if several languages are accepted.
foreach($GLOBALS['_LANG'] as $K) {
if(strpos($_AL, $K)===0)
return $K;
}
// Try to detect any language if not yet detected.
foreach($GLOBALS['_LANG'] as $K) {
if(strpos($_AL, $K)!==false)
return $K;
}
foreach($GLOBALS['_LANG'] as $K) {
if(preg_match("/[\[\( ]{$K}[;,_\-\)]/",$_UA))
return $K;
}
// Return default language if language is not yet detected.
return $GLOBALS['_DLANG'];
}
// Define default language.
$GLOBALS['_DLANG']='zh-tw';
// Define all available languages.
// WARNING: uncomment all available languages
$GLOBALS['_LANG'] = array(
'en',
'es',
'zh-tw',
'zh-cn'
);
?>
session:
<?php
//proc all page display
include('lang.php'); //language detector
class Session
{
var $lang; //Username given on sign-up
var $url; //The page url current being viewed
var $referrer; //Last recorded site page viewed
/* Class constructor */
function Session() {
$this->time = time();
$this->startSession();
}
function cf($filename) { //function to clean a filename string so it is a valid filename
$fp = explode('/',$filename);
$num = count($fp);
return $fp[$num-1];
}
/**
* startSession - Performs all the actions necessary to
* initialize this session object. Tries to determine if the
* the user has logged in already, and sets the variables
* accordingly. Also takes advantage of this page load to
* update the active visitors tables.
*/
function startSession() {
session_start(); //Tell PHP to start the session
/* Set referrer page */
if(isset($_SESSION['url'])) {
$this->referrer = $search = $this->cf($_SESSION['url']);
}
else {
$this->referrer = "/";
}
/* Set current url */
$this->url = $_SESSION['url'] = $this->cf($_SERVER['PHP_SELF']);
/* Set user-determined language: */
//set up languages array:
//set cookie
$langs = array('en','es','zh-tw', 'zh-cn');
if(isset($_GET['lang'])){
if(in_array($_GET['lang'],$langs)){
$this->lang = $_SESSION['lang'] = $_GET['lang'];
setcookie("lang", $_SESSION['lang'], time() + (3600 * 24 * 30));
}
}
else if(isSet($_COOKIE['lang'])) {
$_SESSION['lang'] = $_COOKIE['lang'];
}
else {
$_SESSION['lang'] = 'zh-tw';
}
}
};
/**
* Initialize session object - This must be initialized before g
* the form object because the form uses session variables,
* which cannot be accessed unless the session has started.
*/
$session = new Session;
?>
localization:
<?php
include('session.php'); //language detector
// determine the value of $lang_file according the one in $lang
$languages = array('en', 'es', 'zh-tw', 'zh-cn');
if (in_array($_SESSION['lang'], $languages)) {
$lang_file = 'lang.'.$_SESSION['lang'].'.php';
} else {
$lang_file = 'lang.zh-tw.php';
}
// translation helper function
function l($localization) {
global $lang;
return $lang[$localization]; }
// include file for final output
include_once 'languages/'.$lang_file;
?>
function cf($filename) { //function to clean a filename string so it is a valid filename
$fp = explode('/',$filename);
$num = count($fp);
return $fp[$num-1];
}
/**
* startSession - Performs all the actions necessary to
* initialize this session object. Tries to determine if the
* the user has logged in already, and sets the variables
* accordingly. Also takes advantage of this page load to
* update the active visitors tables.
*/
function startSession() {
session_start(); //Tell PHP to start the session
/* Set referrer page */
if(isset($_SESSION['url'])) {
$this->referrer = $search = $this->cf($_SESSION['url']);
}
else {
$this->referrer = "/";
}
/* Set current url */
$this->url = $_SESSION['url'] = $this->cf($_SERVER['PHP_SELF']);
/* Set user-determined language: */
//set up languages array:
//set cookie
$langs = array('en','es','zh-tw', 'zh-cn');
if(isset($_GET['lang'])){
if(in_array($_GET['lang'],$langs)){
$this->lang = $_SESSION['lang'] = $_GET['lang'];
setcookie("lang", $_SESSION['lang'], time() + (3600 * 24 * 30));
}
}
else if(isSet($_COOKIE['lang'])) {
$_SESSION['lang'] = $_COOKIE['lang'];
}
else {
$_SESSION['lang'] = 'zh-tw';
}
}
};
/**
* Initialize session object - This must be initialized before g
* the form object because the form uses session variables,
* which cannot be accessed unless the session has started.
*/
$session = new Session;
?>