Get the client IP address using PHP

Question

I want to get the client IP address who uses my website  I am using the PHP   SERVER superglobal     SERVER  REMOTE ADDR      But I see it can not give the correct IP address using this  I get my IP address and see it is different from my IP address and I can also see my IP address in some website like   http   whatismyipaddress com    I paste the IP address which give my PHP function but this website shows no result about this  How does this problem come about and how can I get IP address of the client

User · Answer

In PHP 5 3 or greater  you can get it like this    ip   getenv  HTTP CLIENT IP     getenv  HTTP X FORWARDED FOR     getenv  HTTP X FORWARDED     getenv  HTTP FORWARDED FOR     getenv  HTTP FORWARDED     getenv  REMOTE ADDR

User · Answer

It also works fine for internal IP addresses    function get client ip             ipaddress             if  getenv  HTTP CLIENT IP               ipaddress   getenv  HTTP CLIENT IP          else if getenv  HTTP X FORWARDED FOR               ipaddress   getenv  HTTP X FORWARDED FOR          else if getenv  HTTP X FORWARDED               ipaddress   getenv  HTTP X FORWARDED          else if getenv  HTTP FORWARDED FOR               ipaddress   getenv  HTTP FORWARDED FOR          else if getenv  HTTP FORWARDED               ipaddress   getenv  HTTP FORWARDED          else if getenv  REMOTE ADDR               ipaddress   getenv  REMOTE ADDR          else            ipaddress    UNKNOWN          return  ipaddress

User · Answer

Here is a function to get the IP address using a filter for local and LAN IP addresses   function get IP address         foreach  array  HTTP CLIENT IP                       HTTP X FORWARDED FOR                       HTTP X FORWARDED                       HTTP X CLUSTER CLIENT IP                       HTTP FORWARDED FOR                       HTTP FORWARDED                       REMOTE ADDR   as  key           if  array key exists  key    SERVER      true               foreach  explode        SERVER  key   as  IPaddress                    IPaddress   trim  IPaddress      Just to be safe                  if  filter var  IPaddress                                 FILTER VALIDATE IP                                 FILTER FLAG NO PRIV RANGE   FILTER FLAG NO RES RANGE                          false                         return  IPaddress

User · Answer

ipaddress           if    SERVER  HTTP CLIENT IP       127 0 0 1            ipaddress     SERVER  HTTP CLIENT IP        else if    SERVER  HTTP X FORWARDED FOR       127 0 0 1            ipaddress     SERVER  HTTP X FORWARDED FOR        else if    SERVER  HTTP X FORWARDED       127 0 0 1            ipaddress     SERVER  HTTP X FORWARDED        else if    SERVER  HTTP FORWARDED FOR       127 0 0 1            ipaddress     SERVER  HTTP FORWARDED FOR        else if    SERVER  HTTP FORWARDED       127 0 0 1            ipaddress     SERVER  HTTP FORWARDED        else if    SERVER  REMOTE ADDR       127 0 0 1            ipaddress     SERVER  REMOTE ADDR        else          ipaddress    UNKNOWN

User · Answer

The simplest way to get the visitor   s client   s IP address is using the   SERVER  REMOTE ADDR   or   SERVER  REMOTE HOST   variables   However  sometimes this does not return the correct IP address of the visitor  so we can use some other server variables to get the IP address   The below both functions are equivalent with the difference only in how and from where the values are retrieved   getenv   is used to get the value of an environment variable in PHP      Function to get the client IP address function get client ip          ipaddress           if  getenv  HTTP CLIENT IP             ipaddress   getenv  HTTP CLIENT IP        else if getenv  HTTP X FORWARDED FOR             ipaddress   getenv  HTTP X FORWARDED FOR        else if getenv  HTTP X FORWARDED             ipaddress   getenv  HTTP X FORWARDED        else if getenv  HTTP FORWARDED FOR             ipaddress   getenv  HTTP FORWARDED FOR        else if getenv  HTTP FORWARDED            ipaddress   getenv  HTTP FORWARDED        else if getenv  REMOTE ADDR             ipaddress   getenv  REMOTE ADDR        else          ipaddress    UNKNOWN       return  ipaddress        SERVER is an array that contains server variables created by the web server      Function to get the client IP address function get client ip          ipaddress           if  isset   SERVER  HTTP CLIENT IP              ipaddress     SERVER  HTTP CLIENT IP        else if isset   SERVER  HTTP X FORWARDED FOR              ipaddress     SERVER  HTTP X FORWARDED FOR        else if isset   SERVER  HTTP X FORWARDED              ipaddress     SERVER  HTTP X FORWARDED        else if isset   SERVER  HTTP FORWARDED FOR              ipaddress     SERVER  HTTP FORWARDED FOR        else if isset   SERVER  HTTP FORWARDED              ipaddress     SERVER  HTTP FORWARDED        else if isset   SERVER  REMOTE ADDR              ipaddress     SERVER  REMOTE ADDR        else          ipaddress    UNKNOWN       return  ipaddress

[php] Get the client IP address using PHP

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