Get client IP with safe and coincident way from server even behind Proxy or Load-Balancer.

Real IP implement on Web application, which solve the problem that the server receiving requests through trust proxies or load-balancers without Transparent-Mode.

echo ClientIP::get();
ClientIP::config([
    'proxyIPs' => ['192.168.0.0/16', '172.217.3.11'],
    'headerKeys' => ['HTTP_X_FORWARDED_FOR']
    ]);
echo ClientIP::get();

If the client IP is 203.169.1.37, there are some connection situation for demonstrating referring by above sample code:

your server is behind a Load-Balencer and in a private network.

ClientIP::config([
    'proxyIPs' => true
    ]);

Setting proxyIPs as true means all requests are go through Load-balancer, which will always get forward IP, same as above setting:

ClientIP::config([
    'proxyIPs' => ['0.0.0.0/32']
    ]);

The result from the server:

192.168.0.10 //Before setting the config
203.169.1.37 //After setting the config, get the forward IP

If your server is in public network, not only receives requests directly, but also supports trust proxies for going through:

ClientIP::config([
    'proxyIPs' => ['172.217.3.11']
    ]);

The result from the server

• Way 1: Client connect to server directly:

203.169.1.37 //Before setting the config
203.169.1.37 //The request IP is not from proxyIPs, so identify as a Client.

• Way 2: Client connect to server through Proxy:

172.217.3.11 //Before setting the config
203.169.1.37 //The request IP comes from proxyIPs, get the forward IP.

Run Composer in your project:

composer require yidas/client-ip

Then initialize it at the bootstrap of application such as config file:

require __DIR__ . '/vendor/autoload.php';
ClientIP::config([
   'proxyIPs' => ['192.168.0.0/16']
   ]);

Example configuration:

ClientIP::config([
   'proxyIPs' => ['192.168.0.0/16', '172.217.2.89'],
   'headerKeys' => ['HTTP_X_FORWARDED_FOR'],
   ]);

The another way to fetch real IP is implemnet from the Web server side:

• Nginx: ngx_http_realip_module

• Apache: mod_remoteip