Online (WAN) IP address minimal output and access methods

Web browser  |  curl  |  lynx  |  wget  |  PHP  |  PERL  |   C/C++  |  VB   

Introduction

PHP IP address detection script is located at  http://show-ip.net/getip/index.php  and  can be accessed in differrent ways, described below.

http://show-ip.net/getip/ [index.php?v=a]
http://show-ip.net/getip/index.php [?v=a]
http://show-ip.net/getip/index.php?v=a|h|p|ah|ap|hp|ahp|ahpo

a - show IP address (default),
h - show hostname (if resolved),
p - show proxy server (if detected),
ah, ap, hp, ahp, ...  - combinations of previous options,
o - HTML output.
( todo:  h - show help; u - show useragent; c - show country; w - show IP whois info; )

PHP script accepts both - GET and POST data passing methods.

Basic client IP address detection PHP script looks like this:

<?php 
 if (isSet($_SERVER)) {
  if (isSet($_SERVER["HTTP_CLIENT_IP"])) {
    $IP = $_SERVER["HTTP_CLIENT_IP"];
  } else {
      $IP = $_SERVER["REMOTE_ADDR"];
    }
  echo $IP;
 } 
?>

or simply <?php echo $_SERVER["REMOTE_ADDR"]; ?>

Note: depending on your network setup (fiewalls, proxy, NAT) and web browser settings, meaning of this IP address can be different.

IP address detection script access methods

Accessing with web browser

      http://show-ip.net/getip/
      http://show-ip.net/getip/index.php
      http://show-ip.net/getip/index.php?v=ahpo

     curl -s   http://show-ip.net/getip/index.php?v=ahp   (GET method)
     curl -d  "v=ahp"  http://show-ip.net/getip/index.php (POST method)
     curl -s --connect-timeout 10 --proxy 200.63.213.2:553 
       http://show-ip.net/getip/index.php?v=ahp (via transparent proxy)
       (http://www.aliveproxy.com/transparent-proxy-list/)

      wget -q -O - http://show-ip.net/getip/index.php?v=ahp

       lynx -dump http://show-ip.net/getip/index.php?v=ahpo 

   <?php echo file_get_contents("http://show-ip.net/getip/"); ?>
   or <?php echo readfile("http://show-ip.net/getip/index.php"); ?> 
   or <?php echo @readfile("http://show-ip.net/getip/index.php?v=ahp"); ?> 
   or <?php echo $fh = fopen ("http://show-ip.net/getip/", r); 
       $data = fread($fh, 24); echo $data; ?> 
   
   or <?php exec ( "lynx  -dump $PAGE_URL" ); ?> 
   or <?php exec ( "links -dump $PAGE_URL" ); ?> 
   or <?php exec ( "some-curl-wget-...-command $PAGE_URL" ); ?> 

Accessing with PERL

      #!/usr/bin/perl
      use LWP::Simple; 
      $content = get("http://show-ip.net/getip/index.php"); 
      die "Couldn't get it!" unless defined $content; 
      print("$content\n"); 

On MS Windows - use these WIN API functions: 

- InternetOpen() 
- InternetOpenUrl() 
- InternetReadFile() 
- InternetCloseHandle()

// IP WAN address PHP script access with C/C++ on Windows OS
// http://show-ip.net/mini/
// 
// getip.c
// cl getip.c  wininet.lib  user32.lib

#include < windows.h >
#include < wininet.h > 
#include < stdio.h >

char output[16];
char getipurl[30] = "http://show-ip.net/getip/";
// char getipurl[45] = "http://show-ip.net/getip/index.php?v=ahp";
// adjust ReadSize value 



int GetIP(char *url)
{
	HINTERNET hInternet;
	HINTERNET hFile;
	DWORD ReadSize;
	BOOL  bResult;
       	
	hInternet = InternetOpen(
		"Some USER-AGENT",
		INTERNET_OPEN_TYPE_PRECONFIG,
		NULL,
		NULL,
		0);


	hFile = InternetOpenUrl(
		hInternet,
                url,
		NULL,
		0,
		INTERNET_FLAG_RELOAD,
		0);

	
		ReadSize = 15;
		bResult = InternetReadFile(
			hFile,
			output,
			15,
			&ReadSize);

		
	output[ReadSize] = '\0';
	
        printf("\n IP: %s\n", output);
      
	InternetCloseHandle(hFile);
	InternetCloseHandle(hInternet);
        return 0;
}


int main()
{
 GetIP(getipurl);
 return 0;
}

Download IP address lookup VB programm (5 KB)
Programm uses integrated IE browser, IP address may be affected by IE proxy settings

See also:

http://www.go2linux.org/what-is-my-public-ip-address-with-linux 
http://www.ibm.com/developerworks/library/os-php-readfiles/index.html 
http://www.governmentsecurity.org/archive/t14632.html 
http://www.debian-administration.org/articles/58 

UnxUtils Native Win32 ports of some GNU utilities (recommended !) 
           Tip: extract content of /usr/local/wbin/ and /bin/ to your %path%
cURL homepage 
Free PHP hosting list

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