//获取域名或主机地址 echo $_server['http_host']." "; #localhost //获取网页地址 echo $_server['php_self']." "; #/blog/testurl.php //获取网址参数 echo $_server["query_string"]." "; #id=5 //获取用户代理 echo $_server['http_referer']." "; //获取完整的url echo 'http://'.$_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