PHP Localization.php

<?php

session_start();

if (isset($_GET["locale"])) {
    $locale = $_GET["locale"];
} else if (isset($_SESSION["locale"])) {
    $locale = $_SESSION["locale"];
} else {
    $locale = "en_US";
}

putenv("LANG=" . $locale);
setlocale(LC_ALL, $locale);

// name matches example.mo
$domain = "example"; 

// name matches locale folder
bindtextdomain($domain, "Locale");
bind_textdomain_codeset($domain, 'UTF-8');

textdomain($domain);

// name matches example2.mo
$domain2 = "example2";

// name matches locale folder
bindtextdomain($domain2, "Locale");
bind_textdomain_codeset($domain2, 'UTF-8');

// Examples:

// _() is an alias of gettext()
echo _("Let's make the web multilingual");

var1 = "one";
var2 = "two";
echo sprintf(_("Let's use the variables %1$s and %2$s", $var1, $var2);

// dgettext() is similar to _(), but it also accepts a domain name if a string from a different textdomain should be used
echo dgettext($domain2, "Let's make the web multilingual");

// ngettext() is used when the plural form is based on the count
echo ngettext("%d page read", "%d pages read", 1); // outputs a form used for singular
echo ngettext("%d page read", "%d pages read", 15); // outputs a form when the count is 15

?>