How to identify server IP address in PHP

Question

How can I identify the server IP address in PHP?

Answer 1

This is what you could use as an adaptation of the above examples without worrying about curl installed on your server.

<?php
      // create a new cURL resource
      $ch = curl_init ();

      // set URL and other appropriate options
      curl_setopt ($ch, CURLOPT_URL, "http://ipecho.net/plain");
      curl_setopt ($ch, CURLOPT_HEADER, 0);
      curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);

      // grab URL and pass it to the browser

      $ip = curl_exec ($ch);
      echo "The public ip for this server is: $ip";
      // close cURL resource, and free up system resources
      curl_close ($ch);
    ?>

Answer 2

If you are using PHP in bash shell you can use:

$server_name=exec('hostname');

Because $_SERVER[] SERVER_ADDR, HTTP_HOST and SERVER_NAME are not set.

Answer 3

I just created a simple script that will bring back the $_SERVER['REMOTE_ADDR'] and $_SERVER['SERVER_ADDR'] in IIS so you don't have to change every variable. Just paste this text in your php file that is included in every page.

/** IIS IP Check **/
if(!$_SERVER['SERVER_ADDR']){ $_SERVER['SERVER_ADDR'] = $_SERVER['LOCAL_ADDR']; }
if(!$_SERVER['REMOTE_ADDR']){ $_SERVER['REMOTE_ADDR'] = $_SERVER['LOCAL_ADDR']; }

Answer 4

Check the $_SERVER array

echo $_SERVER['SERVER_ADDR'];

Answer 5

I came to this page looking for a way of getting my own ip address not the one of the remote machine connecting to me.

This will not work for a windows machine.

But in case someone searches for what I was looking for:

#! /usr/bin/php
<?php
$my_current_ip=exec("ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1'");
echo $my_current_ip;

(Shamelessly adapted from How to I get the primary IP address of the local machine on Linux and OS X?)

Answer 6

If you are using PHP version 5.3 or higher you can do the following:

$host= gethostname();
$ip = gethostbyname($host);

This works well when you are running a stand-alone script, not running through the web server.