php, get client ip address

Question

I have two php files in a same directory of a server (http://www.xxxx.com/php/),

1) write_json.php

 $address['http_client'] = $_SERVER['HTTP_CLIENT_IP']; $address['http_x_forwarded_for'] = $_SERVER['HTTP_X_FORWARDED_FOR']; $address['http_x_forwarded'] = $_SERVER['HTTP_X_FORWARDED']; $address['http_forwarded_for'] = $_SERVER['HTTP_FORWARDED_FOR']; $address['http_forwarded'] = $_SERVER['HTTP_FORWARDED']; $address['remote_addr'] = $_SERVER['REMOTE_ADDR']; header('Content-Type: application/json'); echo json_encode($address);

2) get_ip.php

 $json_url = $_SERVER['SERVER_NAME'] . '/php/write_json.php'; $json_string = ''; $ch = curl_init($json_url); $options = array(CURLOPT_RETURNTRANSFER => true, CURLOPT_HTTPHEADER => array('Content-type: application/json'), CURLOPT_POSTFIELDS => $json_string); curl_setopt_array($ch, $options); $json_string = curl_exec($ch); echo $json_string;

get_ip.php calls write_json.php

if we suppose the client IP is : 76.2.35.46 and the server one is : 80.59.3.23
when I call http://www.xxxx.com/php/get_ip.php on a client browser

It shows me the Server IP not the client IP like this :

 { http_client: null, http_x_forwarded_for: null, http_x_forwarded: null, http_forwarded_for: null, http_forwarded: null, remote_addr: "80.59.3.23" }

How can I get the client IP instead of the server one ?

Pete Scott · Accepted Answer · 2013-07-09 22:52:00Z

You are calling write_json via curl from the server... that is, the server is actually requesting the write_json file, so write_json is seeing the request come from the server. Why not just use an include rather than a curl call?

user4271704 · Accepted Answer · 2016-09-23 06:06:21Z

Not possible this way. You need to get the client ip first then send it as posted data to server via curl.

Umesh Singh · Accepted Answer · 2018-03-12 15:59:39Z

Trying to get client IP use following function that will return client IP

// 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; }

After getting IP in a variable then send

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