function get_timezone_abbreviation($timezone_id)
{
    if($timezone_id){
        $abb_list = timezone_abbreviations_list();

        $abb_array = array();
        foreach ($abb_list as $abb_key => $abb_val) {
            foreach ($abb_val as $key => $value) {
                $value['abb'] = $abb_key;
                array_push($abb_array,$value);
            }
        }

        foreach ($abb_array as $key => $value) {
            if($value['timezone_id'] == $timezone_id){
                return strtoupPEr($value['abb']);
            }
        }
    }
    return FALSE;
}

get_timezone_abbreviation( ‘美国/纽约’);

你得到：

美东时间