PHP獲取路徑

//獲取域名或主機地址

echo $_SERVER['HTTP_HOST']."<br>"; #jiqing.nikon.com
echo 'http://'.$_SERVER['HTTP_HOST'].'/';  #http://jiqing.nikon.com/

//獲取網頁地址

echo $_SERVER['PHP_SELF']."<br>"; #/Home/picture

//獲取網址參數

echo $_SERVER["QUERY_STRING"]."<br>"; #machine_type_id=2

//獲取用戶代理

echo $_SERVER['HTTP_REFERER']."<br>"; #http://jiqing.nikon.com/index.php/Home/index

//獲取完整的url

echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."<br>"; # http://jiqing.nikon.com/index.php/Home/picture?machine_type_id=2

echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']."<br>"; #http://jiqing.nikon.com/Home/picture?machine_type_id=2

//包含端口號的完整url

echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]."<br>";#http://jiqing.nikon.com:80/index.php/Home/picture?machine_type_id=2

//只取路徑

echo 'http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]."<br>"; # http://jiqing.nikon.com/index.php/Home

應用案例，根據瀏覽器類型，自動切換

vendor('Func.Func');
if (!Func::isMobile()) { // 跳轉到手機端
    if ($_SERVER['QUERY_STRING']) {
        header("location: /index.php".$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']);
    } else {
        header("location: /index.php".$_SERVER['PHP_SELF']);
    }
}