php获取当前页面完整URL的代码

2，php代码：

#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
//包含端口号的完整urlecho 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; #http://localhost:80/blog/testurl.php?id=5
//by www.jbxue.com
//只取路径$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; echo dirname($url); #http://localhost/blog