PHP获取当前页面的完整URL

javascript实现：

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

PHP实现

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



//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 www.jbxue.com

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