PHP获取当前页面的URL地址

//获取域名或主机地址  blog.iinu.com.cn
echo $_SERVER['HTTP_HOST']."<br>";

//获取网页地址  /Article/articleshow/id/191.html
echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php

//获取网址参数  /Article/articleshow/id/191.html
echo $_SERVER["QUERY_STRING"]."<br>";

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

//获取完整的url https://blog.iinu.com.cn/Article/articleshow/id/191.html echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];

//包含端口号的完整url  https://blog.iinu.com.cn:80/Article/articleshow/id/191.html echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];

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