How to get Real IP from Visitor

Question

I m using this PHP code to get a visitor s IP address    lt  php echo   SERVER  REMOTE ADDR      gt    But  I can t get the real IP address from visitors when they are using a proxy  Is there any way to get a visitor s IP address in this case

User · Answer

Proxies may send a HTTP X FORWARDED FOR header but even that is optional   Also keep in mind that visitors may share IP addresses  University networks  large companies and third-world low-budget ISPs tend to share IPs over many users

User · Answer

If the Proxy is which you trust  you can try   Assume the Proxy IP is 151 101 2 10    lt  php   trustProxyIPs     151 101 2 10      clientIP    isset   SERVER  REMOTE ADDR        SERVER  REMOTE ADDR     NULL   if  in array  clientIP   trustProxyIPs           headers     HTTP CLIENT IP    HTTP X FORWARDED FOR         foreach   headers as  key   gt   header             if  isset   SERVER  header    amp  amp  filter var   SERVER  header   FILTER VALIDATE IP                   clientIP     SERVER  header                break                     echo  clientIP    This will prevent forged forward header by direct requested clients  and get real IP via trusted Proxies

User · Answer

This is my approach    function getRealUserIp        switch true         case   empty   SERVER  HTTP X REAL IP       return   SERVER  HTTP X REAL IP          case   empty   SERVER  HTTP CLIENT IP       return   SERVER  HTTP CLIENT IP          case   empty   SERVER  HTTP X FORWARDED FOR       return   SERVER  HTTP X FORWARDED FOR          default   return   SERVER  REMOTE ADDR               How to use    ip   getRealUserIp

User · Answer

apply this code for get the ipaddress       if  getenv  HTTP X FORWARDED FOR       pipaddress   getenv  HTTP X FORWARDED FOR      ipaddress   getenv  REMOTE ADDR         echo  Your Proxy IP address is      pipaddress    via  ipaddress            else    ipaddress   getenv  REMOTE ADDR    echo  Your IP address is    ipaddress         ------------------------------------------------------------------------

User · Answer

Yes    SERVER  HTTP X FORWARDED FOR   is how I see my ip when under a proxy on my nginx server    But your best bet is to run phpinfo   on a page requested from under a proxy so you can look at all the availabe variables and see what is the one that carries your real ip

User · Answer

This works for Windows and Linux  It doesn t matter if it s localhost or online        function getIP          ip     SERVER  SERVER ADDR         if  PHP OS     WINNT             ip   getHostByName getHostName                if  PHP OS     Linux             command   sbin ifconfig           exec  command   output              var dump  output            pattern     inet addr                       ip   array            foreach   output as  key   gt   subject                 result   preg match all  pattern   subject   subpattern               if   result    1                    if   subpattern 1  0      127 0 0 1                    ip    subpattern 1  0                           var dump  subpattern                       return  ip

User · Answer

Try this php code    lt  PHP  function getUserIP            Get real visitor IP behind CloudFlare network     if  isset   SERVER  HTTP CF CONNECTING IP                       SERVER  REMOTE ADDR       SERVER  HTTP CF CONNECTING IP                    SERVER  HTTP CLIENT IP       SERVER  HTTP CF CONNECTING IP               client       SERVER  HTTP CLIENT IP         forward      SERVER  HTTP X FORWARDED FOR         remote      SERVER  REMOTE ADDR         if filter var  client  FILTER VALIDATE IP                  ip    client            elseif filter var  forward  FILTER VALIDATE IP                  ip    forward            else                ip    remote             return  ip       user ip   getUserIP     echo  user ip     Output IP address  Ex  177 87 193 134      gt

User · Answer

This is my function   benefits     Work if   SERVER was not available  Filter private and or reserved IPs  Process all forwarded IPs in X FORWARDED FOR Compatible with CloudFlare Can set a default if no valid IP found  Short  amp  Simple              Get real user ip       Usage sample     GetRealUserIp       GetRealUserIp  ERROR  FILTER FLAG NO RES RANGE           param string  default default return value if no valid ip found     param int     filter options filter options  default is FILTER FLAG NO PRIV RANGE   FILTER FLAG NO RES RANGE        return string real user ip      function GetRealUserIp  default   NULL   filter options   12582912         HTTP X FORWARDED FOR   isset   SERVER     SERVER  HTTP X FORWARDED FOR   getenv  HTTP X FORWARDED FOR         HTTP CLIENT IP   isset   SERVER    SERVER  HTTP CLIENT IP   getenv  HTTP CLIENT IP         HTTP CF CONNECTING IP   isset   SERVER    SERVER  HTTP CF CONNECTING IP   getenv  HTTP CF CONNECTING IP         REMOTE ADDR   isset   SERVER    SERVER  REMOTE ADDR   getenv  REMOTE ADDR          all ips   explode        HTTP X FORWARDED FOR  HTTP CLIENT IP  HTTP CF CONNECTING IP  REMOTE ADDR        foreach   all ips as  ip            if   ip   filter var  ip  FILTER VALIDATE IP   filter options               break            return  ip  ip  default

User · Answer

This is the most common technique I ve seen   function getUserIP         if  array key exists  HTTP X FORWARDED FOR     SERVER   amp  amp   empty   SERVER  HTTP X FORWARDED FOR                if  strpos   SERVER  HTTP X FORWARDED FOR         gt 0                 addr   explode       SERVER  HTTP X FORWARDED FOR                 return trim  addr 0              else               return   SERVER  HTTP X FORWARDED FOR                        else           return   SERVER  REMOTE ADDR              Note that it does not guarantee it you will get always the correct user IP because there are many ways to hide it

[php] How to get Real IP from Visitor?

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