用php来检测proxy

终于写出个有用的东西了！
能够检测大部分通过代理服务器访问的ip.

1   
2//beiji.com 2000.6.17   
3$ip = getenv("REMOTE_ADDR");   
4$v = getenv("HTTP_VIA");   
5$f = getenv("HTTP_X_FORWARDED_FOR");   
6$c = getenv("HTTP_XROXY_CONNECTION");   
7$o = getenv("HTTP_PRAGMA");   
8  
9print '

1REMOTE_ADDR';   
2print $ip;   
3  
4if (($v=="")&&($f=="")&&($c=="")&&($o=="")){   
5print "

1not through proxy";   
2}   
3else {   
4print "

1through proxy";   
2print '

1http_via: ';print $v;   
2print '

1http_x_forwarded_for: ';print $f;   
2print '

1http_xroxy_connection: ';print $c;   
2print '

1http_pragma: ';print $o;   
2}