Introduction: country
identification without databases
This script was originally
developed for geolocalization of visitors to my
site. I had not database access,
so in order to make the script fast, I splitted the information from
IP to Country Database (provided by software77.net)
into several smaller files. All those files may be download. Check this
sample file.
Bellow you will find examples of code allowing to display the
country.
Check here for response to some
questions from users
Basic script for country identification of
IP
In order to use this script, download compressed Database
files in the top of this page, save them
within a directory named
"ip_files", and use the function bellow to get a two letters country
code. If you want to identify visitors from specific countries, check here
<?php
$two_letter_country_code=iptocountry("101.102.103.104");
function iptocountry($ip) {
$numbers = preg_split( "/\./",
$ip);
include("ip_files/".$numbers[0].".php");
$code=($numbers[0] * 16777216) + ($numbers[1] *
65536)
+ ($numbers[2] * 256) + ($numbers[3]);
foreach($ranges as $key => $value){
if($key<=$code){
if($ranges[$key][0]>=$code){$country=$ranges[$key][1];break;}
}
}
if ($country==""){$country="unkown";}
return $country;
}
?>
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How the function works:
- Line 5: IP address
will be split into individual numbers and saved to an array($numbers).
- Line 6: Based in
the first number of the IP address ("101" in the example), a PHP file
in ip_files/ directory will be included (in
the example the file to be included will be "ip_files/101.php"). This
file has known country codes for IP addresses starting with the
selected first number (p.e: 101.###.###.###, where # is any digit).
- Line 7: IP address
is transform into appropriate code.
- Line 8-12: Data
from "ip_files/101.php" is checked in order to find a range of codes
which includes the code obtained by transforming our IP.
- Line 13: In case IP
address is not included in the database, the value for $country will be
"unkown".
- Line 14: Two letter country code is returned. In
case no matches are obtained, the function will return "" (nothing).
Hope it works fine for you.
Getting the IP address of
visitors and displaying the country
In case we want to identify geographical location of visitors,
we must get from them the IP address.
The IP address of visitors will be
contained in the enviromental variable $REMOTE_ADDR
In the example bellow,
depending upon country code, info 1 or info 2 is shown:
<?
$IPaddress=$_SERVER['REMOTE_ADDR'];
$two_letter_country_code=iptocountry($IPaddress);
if ($two_letter_country_code=="US"){
print "This is ad number 1, because you are from
USA";
}else{
print "This is ad number 2, because you are not from
USA";
}
function iptocountry($ip) {
$numbers = preg_split( "/\./",
$ip);
include("ip_files/".$numbers[0].".php");
$code=($numbers[0] * 16777216) + ($numbers[1] *
65536)
+ ($numbers[2] * 256) + ($numbers[3]);
foreach($ranges as $key => $value){
if($key<=$code){
if($ranges[$key][0]>=$code){$two_letter_country_code=$ranges[$key][1];break;}
}
}
if
($two_letter_country_code==""){$two_letter_country_code="unkown";}
return $two_letter_country_code;
}
?>
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Getting the IP address of
visitors and displaying
three letters country code or complete country name
On request, we have added to the compressed document a file
named countries.php.
This file may be used to display three letters country code or complete
name of country. The code bellow allows getting both data:
<?
$IPaddress=$_SERVER['REMOTE_ADDR'];
$two_letter_country_code=iptocountry($IPaddress);
include("IP_FILES/countries.php");
$three_letter_country_code=$countries[ $two_letter_country_code][0];
$country_name=$countries[$two_letter_country_code][1];
print "Two letters code: $two_letter_country_code<br>";
print "Three letters code: $three_letter_country_code<br>";
print "Country name: $country_name<br>";
function iptocountry($ip) {
$numbers = preg_split( "/\./", $ip);
include("ip_files/".$numbers[0].".php");
$code=($numbers[0] * 16777216) + ($numbers[1] *
65536) + ($numbers[2] * 256) + ($numbers[3]);
foreach($ranges as $key => $value){
if($key<=$code){
if($ranges[$key][0]>=$code){$two_letter_country_code=$ranges[$key][1];break;}
}
}
if
($two_letter_country_code==""){$two_letter_country_code="unkown";}
return $two_letter_country_code;
}
?> |
Getting the IP address of
visitors, and displaying country and flag
In case you want to
display flags in your page, download Flags file in the top of this page,
and save all pictures to a folder named "flags" .
We have added a few lines of code to script is previous example
(in red) which
allows showing country specific flags in our pages. This code will
check
whether a gif file containing the two country code exists in "flags"
folder and displays it. In case the gif file in not in the folder, a
default white flag is displayed. In case you have any of the missing
flags, please send
them to us.
<?
$IPaddress=$_SERVER['REMOTE_ADDR'];
$two_letter_country_code=iptocountry($IPaddress);
include("IP_FILES/countries.php");
$three_letter_country_code=$countries[ $two_letter_country_code][0];
$country_name=$countries[$two_letter_country_code][1];
print "Two letters code: $two_letter_country_code<br>";
print "Three letters code: $three_letter_country_code<br>";
print "Country name: $country_name<br>";
// To display flag
$file_to_check="flags/$two_letter_country_code.gif";
if (file_exists($file_to_check)){
print "<img src=$file_to_check width=30 height=15><br>";
}else{
print "<img src=flags/noflag.gif width=30 height=15><br>";
}
function iptocountry($ip) {
$numbers = preg_split( "/\./", $ip);
include("ip_files/".$numbers[0].".php");
$code=($numbers[0] * 16777216) + ($numbers[1] *
65536) + ($numbers[2] * 256) + ($numbers[3]);
foreach($ranges as $key => $value){
if($key<=$code){
if($ranges[$key][0]>=$code){$two_letter_country_code=$ranges[$key][1];break;}
}
}
if
($two_letter_country_code==""){$two_letter_country_code="unkown";}
return $two_letter_country_code;
}
?> |
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