Shit accept code.

function getLanguagePreferrenceFromBrowser($languageOverride = FALSE){

    $langs = array();

    $languageString = FALSE;

    if( isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) ){
        $languageString = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
    }

    if($languageOverride !== FALSE){
        $languageString = $languageOverride;
    }

    if($languageString !== FALSE) {
        // break up string into pieces (languages and q factors)
        preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', $languageString, $lang_parse);

        if (count($lang_parse[1])) {
            // create a list like "en" => 0.8
            $langs = array_combine($lang_parse[1], $lang_parse[4]);

            // set default to 1 for any without q factor
            foreach ($langs as $lang => $val) {
                if ($val === ''){
                    $langs[$lang] = 1;
                }
            }

            // sort list based on value
            arsort($langs, SORT_NUMERIC);
        }
    }


    // look through sorted list and use first one that matches our languages
    foreach ($langs as $lang => $val) {
        //foreach($knownLanguages as $languageAbbrev => $languageID){

        foreach($GLOBALS['activeLanguagesArray'] as $activeLanguage){
            $languageAbbrev = $activeLanguage['abbreviation'];
            $languageID = $activeLanguage['languageID'];

            if (strpos($lang, $languageAbbrev) === 0) {
                return $languageID;
            }
        }
    }

    return LANGUAGE_ENGLISH;
}