終于寫出個有用的東西了！
能夠檢測大部分通過代理服務(wù)器訪問的ip.
<?php  
//beiji.com   2000.6.17  
$ip = getenv("REMOTE_ADDR");  
$v = getenv("HTTP_VIA");  
$f = getenv("HTTP_X_FORWARDED_FOR");  
$c = getenv("HTTP_XROXY_CONNECTION");  
$o = getenv("HTTP_PRAGMA");  

print '<br>REMOTE_ADDR';  
print $ip;  

if (($v=="")&&($f=="")&&($c=="")&&($o=="")){  
print "<br>not through proxy";  
}  
else {  
print "<br>through proxy";  
print '<br>http_via: ';print $v;  
print '<br>http_x_forwarded_for: ';print $f;  
print '<br>http_xroxy_connection: ';print $c;  
print '<br>http_pragma: ';print $o;  
}  
?>  

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