1 来自：http://www.cnblogs.com/A-Song/archive/2011/12/14/2288215.html
2
3 #测试网址: http://localhost/blog/testurl.php?id=5
4
5 //获取域名或主机地址
6 echo $_SERVER['HTTP_HOST']."<br>"; #localhost
7
8 //获取网页地址
9 echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php
10
11 //获取网址参数
12 echo $_SERVER["QUERY_STRING"]."<br>"; #id=5
13
14 //获取用户代理
15 echo $_SERVER['HTTP_REFERER']."<br>";
16
17 //获取完整的url
18 echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
19 echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];
20 #http://localhost/blog/testurl.php?id=5
21
22 //包含端口号的完整url
23 echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
24 #http://localhost:80/blog/testurl.php?id=5
25
26 //只取路径
27 $url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];
28 echo dirname($url);
29 #http://localhost/blog
30
31
32
33
34
35 以下内容由本人添加：
36
37 //取得当前url目录
38
39 $url = 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
40 echo $url = substr($url, 0, strlen($url) - strlen(basename(__FILE__)));
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