How do I find my server's IP address in PHP(CLI)

Question

You can get the hostname by using gethostname

try this it should return the ip address of the server

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

If you are working with PHP < 5.3, this may help (on *NIX based systems atleast):

 mscharley@S04:~$ cat test.php
#!/usr/bin/env php
<?php

function getIPs($withV6 = true) {
    preg_match_all('/inet'.($withV6 ? '6?' : '').' addr: ?([^ ]+)/', `ifconfig`, $ips);
    return $ips[1];
}

$ips = getIPs();
var_dump($ips);

 mscharley@S04:~$ ./test.php
array(5) {
  [0]=>
  string(13) "72.67.113.141"
  [1]=>
  string(27) "fe80::21c:c0ff:fe4a:d09d/64"
  [2]=>
  string(13) "72.67.113.140"
  [3]=>
  string(9) "127.0.0.1"
  [4]=>
  string(7) "::1/128"
}
 mscharley@S04:~$

Or, if you don't anticipate doing it often, then perhaps this would work (just don't abuse it):

$ip = file_get_contents('http://whatismyip.org/');

I know this is a fairly old question, but there doesn't seem to be a definitive answer (in as much as one is possible.) I've had a need to determine this value, both on *NIX boxes and on Win X boxes. Also from a CLI executed script as well as a non-CLI script. The following function is the best I've come up with, which borrows on different concepts people have spoke of over the years. Maybe it can be of some use:

function getServerAddress() {
    if(isset($_SERVER["SERVER_ADDR"]))
    return $_SERVER["SERVER_ADDR"];
    else {
    // Running CLI
    if(stristr(PHP_OS, 'WIN')) {
        //  Rather hacky way to handle windows servers
        exec('ipconfig /all', $catch);
        foreach($catch as $line) {
        if(eregi('IP Address', $line)) {
            // Have seen exec return "multi-line" content, so another hack.
            if(count($lineCount = split(':', $line)) == 1) {
            list($t, $ip) = split(':', $line);
            $ip = trim($ip);
            } else {
            $parts = explode('IP Address', $line);
            $parts = explode('Subnet Mask', $parts[1]);
            $parts = explode(': ', $parts[0]);
            $ip = trim($parts[1]);
            }
            if(ip2long($ip > 0)) {
            echo 'IP is '.$ip."\n";
            return $ip;
            } else
            ; // TODO: Handle this failure condition.
        }
        }
    } else {
        $ifconfig = shell_exec('/sbin/ifconfig eth0');
        preg_match('/addr:([\d\.]+)/', $ifconfig, $match);
        return $match[1];
    }
    }
}

If all else fails, you could always exec ipconfig or ifconfig, depending on your platform, and parse the result.