Simple language detect function(PHP)

Well, I have some extra time so I develop this code snippet.



<?php

function hw_delectlang() {

    if (substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],0,2) == 'en'){


        $lang = 'en'; //English

    } elseif (substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],0,2) == 'zh'){


        if ((substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],3,2) != 'cn') && (substr($_SERVER['HTTP_ACCEPT_LANGUAGE'],3,2) != 'sg')){


            $lang = 'cht'; //Chinese Trad.

        } else {

            $lang = 'chs'; //Chinese Simp.

        }

    } else {

        $lang = 'en'; //Default is English


    }

    return $lang;

}

?>



Hope this works.