PHP中获取当前页面的完整URL

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
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'].$_SERVER["REQUEST_URI"];
echodirname($url);
#http://localhost/blog

转自http://www.cnblogs.com/A-Song/archive/2011/12/14/2288215.html