PHP: Localization configuration

config.php

<?php

/* -------------------- LOCALIZATION -------------------- */ 

// PHP INI charset
	ini_set("default_charset", "UTF-8");

// Default timezone
	date_default_timezone_set('America/Sao_Paulo');

// Verify if there is some GET with choosed language
	if( isset($_GET['lang']) ) {
		$_SESSION[get_site_config('lang_session')] = $_GET['lang'];
		header( 'Location: ' . get_site_info('url'));
	}

// Default language
	$locale = "pt_BR";

// Verify if there is any session iniciated with other language
	if (isset( $_SESSION[get_site_config('lang_session')] ))
	$locale = $_SESSION[get_site_config('lang_session')];

// Language configuration and .pot location
	putenv("LC_ALL=$locale");
	setlocale(LC_ALL, $locale);
	bindtextdomain("messages", "./locale");
	textdomain("messages");