js和php如何获取当前url的内容

#测试网址: http://localhost/blog/testurl.php?id=5

代码如下:

//获取域名或主机地址 
echo $_SERVER['HTTP_HOST']."<br>"; #localhost 

//获取网页地址 
echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php 

//获取网址参数 
echo $_SERVER["QUERY_STRING"]."<br>"; #id=5 

//获取用户代理 
echo $_SERVER['HTTP_REFERER']."<br>"; 

//获取完整的url 
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; 
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; 
#http://localhost/blog/testurl.php?id=5 

//包含端口号的完整url 
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; 
#http://localhost:80/blog/testurl.php?id=5 

//只取路径 
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; 
echo dirname($url); 
#http://localhost/blog

javascript实现:

代码如下:

top.location.href 顶级窗口的地址 
this.location.href 当前窗口的地址

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