如果用户使用代理发送真实IP的头部,我可以追踪到用户的“真实”IP。但是否有更好的解决方案或更多的头部信息?
由于此函数在脚本中经常使用,因此必须非常快速,但在这种情况下似乎不是很理想 :/
我想到了一些建议,但无法实现:
- 按照“野外”中最常用的顺序放置标头,以便函数能够快速完成
- 使IP的预匹配检测更快
===
function get_real_ip()
{
$proxy_headers = array(
'CLIENT_IP',
'FORWARDED',
'FORWARDED_FOR',
'FORWARDED_FOR_IP',
'HTTP_CLIENT_IP',
'HTTP_FORWARDED',
'HTTP_FORWARDED_FOR',
'HTTP_FORWARDED_FOR_IP',
'HTTP_PC_REMOTE_ADDR',
'HTTP_PROXY_CONNECTION',
'HTTP_VIA',
'HTTP_X_FORWARDED',
'HTTP_X_FORWARDED_FOR',
'HTTP_X_FORWARDED_FOR_IP',
'HTTP_X_IMFORWARDS',
'HTTP_XROXY_CONNECTION',
'VIA',
'X_FORWARDED',
'X_FORWARDED_FOR'
);
foreach($proxy_headers as $proxy_header)
{
if(isset($_SERVER[$proxy_header]) && preg_match("/^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$/", $_SERVER[$proxy_header])) /* HEADER ist gesetzt und dies ist eine gültige IP */
{
return $_SERVER[$proxy_header];
}
else if(stristr(',', $_SERVER[$proxy_header]) !== FALSE) /* Behandle mehrere IPs in einer Anfrage(z.B.: X-Forwarded-For: client1, proxy1, proxy2) */
{
$proxy_header_temp = trim(array_shift(explode(',', $_SERVER[$proxy_header]))); /* Teile in einzelne IPs, gib die letzte zurück und entferne Leerzeichen */
if(($pos_temp = stripos($proxy_header_temp, ':')) !== FALSE) $proxy_header_temp = substr($proxy_header_temp, 0, $pos_temp); /* Entferne den Port */
if(preg_match("/^([1-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(\.([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3}$/", $proxy_header_temp) return $proxy_header_temp;
}
}
return $_SERVER['REMOTE_ADDR'];
}
192.168.0.81
。我想知道它有什么用处? - Your Common Sense