top.location.href  //頂級窗口的地址this.location.href //當前窗口的地址

#測試網址:   http://localhost/blog/testurl.php?id=5//獲取域名或主機地址echo $_SERVER['HTTP_HOST']."<br>"; #localhost//獲取網頁地址echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php//獲取網址參數echo $_SERVER["QUERY_STRING"]."<br>"; #id=5//獲取用戶代理echo $_SERVER['HTTP_REFERER']."<br>";//獲取完整的urlecho 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];#http://localhost/blog/testurl.php?id=5//包含端口號的完整urlecho 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];#http://localhost:80/blog/testurl.php?id=5//只取路徑$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];echo dirname($url);#http://localhost/blog