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如果用户使用了代理服务器,真实ip就不在HTTP_CLIENT_IP头中,而需要通过http头HTTP_X_FORWARDED_FOR来解析了。
如下php函数:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | <? function GetIP() { //获取IP if ( $_SERVER [ "HTTP_X_FORWARDED_FOR" ]) $ip = $_SERVER [ "HTTP_X_FORWARDED_FOR" ]; else if ( $_SERVER [ "HTTP_CLIENT_IP" ]) $ip = $_SERVER [ "HTTP_CLIENT_IP" ]; else if ( $_SERVER [ "REMOTE_ADDR" ]) $ip = $_SERVER [ "REMOTE_ADDR" ]; else if ( getenv ( "HTTP_X_FORWARDED_FOR" )) $ip = getenv ( "HTTP_X_FORWARDED_FOR" ); else if ( getenv ( "HTTP_CLIENT_IP" )) $ip = getenv ( "HTTP_CLIENT_IP" ); else if ( getenv ( "REMOTE_ADDR" )) $ip = getenv ( "REMOTE_ADDR" ); else $ip = "Unknown" ; return $ip ; } ?> |