能夠使多域名但是隻有一個站點的小站，通過路由訪問到各個指定目錄

<?php
//域名跳轉路由
//預設跳轉
$default = "http://www.stanwind.com/index.php";

//自定義域名路由
$routers = array(
    "so.stanwind.com" => "http://www.stanwind.com/zzss",
    "proxy.stanwind.com" => "http://www.stanwind.com/proxy",
    "json.stanwind.com" => "http://www.stanwind.com/json"
);

$currentHost = $_SERVER['HTTP_HOST'];
//echo $_SERVER['HTTP_HOST'];//獲取當前域名 

$goPage = $default;
if (array_key_exists($currentHost, $routers)) {
    $goPage = $routers[$currentHost];
}

if (array_key_exists("QUERY_STRING", $_SERVER) && !empty($_SERVER["QUERY_STRING"])) {
    $goPage = $goPage.'?'.$_SERVER["QUERY_STRING"];
}
//echo $_SERVER["QUERY_STRING"];
//echo $goPage;
//重定向瀏覽器 
header("Location: ".$goPage); 
//確保重定向後，後續程式碼不會被執行 
exit;