php獲取當前頁面的完整url

測試網址:http://afish.cnblogs.com/p/3941211.html?id=1

//獲取域名或主機地址
echo $_SERVER['HTTP_HOST']."<br />"; #afish.cnblogs.com

//獲取網頁地址
echo $_SERVER['PHP_SELF']."<br />"; #/p/3941211.html

//獲取網址參數
echo $_SERVER["QUERY_STRING"]."<br />"; #id=1

//獲取用戶代理
echo $_SERVER['HTTP_REFERER']."<br />";

//獲取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];
#http://afish.cnblogs.com/p/3941211.html?id=1

//包含端口號的完整url
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
#http://afish.cnblogs.com:80/p/3941211.html?id=1

//只取路徑
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];
echo dirname($url);
#http://afish.cnblogs.com/p

javascript獲取url：

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