apteryx.indivia.net/include/localization.php

<?php
/* CHANGELOG:
 @1.1: 
  - supporta locale con forma la_LA, la, la_LA.utf-8, la_LA.UTF-8, la.UTF-8, la.utf-8
*/
$version="1.1";

$_td_stack = array(); // text domains stack

$langarray = array('it_IT','en_US','es_ES','de_DE','eo_EO');
//$lang = "eo_EO";
If (isSet($_GET["lang"])) 
	$lang = $_GET["lang"];
else {
	$lang = $langarray[0];
	/* vedi le preferenze del browser */
	$user_langs = explode(",", getenv("HTTP_ACCEPT_LANGUAGE"));
	foreach ($user_langs as $user_lang) {
		$user_lang_items = explode(";", $user_lang);
		if (in_array($user_lang_items[0], $langarray)) {
			$lang = $user_lang_items[0];
			break;
		}
	}
}

$charset="UTF-8";
$gettext_domain="messages";
$locale_dir="res/locale";
/**
 * Il locale deve essere presente nel sistema usa "locale -a" per
 * verificarlo, non ovunque si chiama allo  stesso modo e non tutti 
 * i locali si chiamano allo stesso modo, l'esperanto ad esempio 
 * non rispetta la nomenclatura classica 
*/ 
putenv("LC_ALL=$lang");
$l=split("_",$lang);
if(! setlocale(LC_ALL, $lang.".".$charset))
	if(! setlocale(LC_ALL, $lang)) 
		if(! setlocale(LC_ALL,$l[0].".".$charset)) 
				setlocale(LC_ALL,$l[0]);

bindtextdomain($gettext_domain, "res/locale");
textdomain($gettext_domain);
bind_textdomain_codeset($gettext_domain, $charset); 

function printLangSelector() {
	global $lang;
	global $langarray;
	$targetname = $_SERVER['PHP_SELF'];
	
	$l_arg="lang=";
	$newQueryString="";
	$queryString= $_SERVER['QUERY_STRING'];
	$argS = explode("&",$queryString);
	if(strpos($queryString,$l_arg)!==FALSE){
		foreach ($argS as $arg){
			if(strpos($arg,$l_arg)===FALSE) 
				$newQueryString.=$arg."&";
		}
	}
	
	echo "<ul class='langsel'>";
	foreach ($langarray as $l) {
		$label=split("_",$l);
		$class="";
		if ($l == $lang)
			$class="class='it'";
			
		echo "<li ".$class."><a href='".$targetname."?".$newQueryString.$l_arg.$l."'>".$label[0]."</a></li>";
	}
	$foo = getenv("HTTP_ACCEPT_LANGUAGE");
	echo "</ul>\n";
}

/**
 * Sets a new text domain after recording the current one
 * so it can be restored later with restore_textdomain().
 *
 * It's possible to nest calls to these two functions.
 * @param string the new text domain to set
 */
function set_textdomain($td)
{
    global $_td_stack;
   
    $old_td = textdomain(NULL);
   
    if ($old_td)    {
        if (!strcmp($old_td, $td))        
        	array_push($_td_stack, false);
        else 
        	array_push($_td_stack, $old_td);
    }
   
    textdomain($td);
}

/**
 * Restore the text domain active before the last call to
 * set_textdomain().
 */
function restore_textdomain()
{
    global $_td_stack;
   
    $old_td = array_pop($_td_stack);
   
    if ($old_td)
    	textdomain($old_td);
}
?>