PROBLEM :
How can we able to get the client IP address using PHP?
- We want to keep record of the user who logged into our website through IP address.
SOLUTION 1:
- The simplest way is remote address server super global. But this is not the best way to do is using different server super global functions, http client IP and http x forwarded for, remote address.
- By using these three functions we can get correct ip address of a client or computer who is accessing our website.
- Simply use the below code to get client IP address in php.
php code
// Get the client IP address
$ip = $_SERVER['REMOTE_ADDR‘]
we can use different server super global functions to check valid IP address.(http client IP and http x forwarded for, remote address)
php code
$http_client_ip = $_SERVER['HTTP_CLIENT_IP']; //Internet ip address
$http_x_forwarded_for = $_SERVER['HTTP_X_FORWARDED_FOR']; //checking for proxy server
$remote_addr = $_SERVER['REMOTE_ADDR']; //
if(!empty($http_client_ip)){
$ip = $http_client_ip;
}elseif(!empty($http_x_forwarded_for)){
$ip = $http_x_forwarded_for;
}else{
$ip = $remote_addr;
}
echo $ip;
SOLUTION 2:
Sample code:
php code
if (!empty($_SERVER['HTTP_CLIENT_IP']))
{ $ip = $_SERVER['HTTP_CLIENT_IP'];
}
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip = $_SERVER['REMOTE_ADDR'];
}
Note: Using the above code has security implications. The client can set all HTTP header information (ie. $_SERVER[‘HTTP_…) to any arbitrary value it wants. As such it’s far more reliable to use $_SERVER[‘REMOTE_ADDR’], as this cannot be set by the user.
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SOLUTION 3:
Try this :
php code
echo $_SERVER['REMOTE_ADDR'];
SOLUTION 4:
Sample code:
php code
$ip = $_SERVER['HTTP_CLIENT_IP']?$_SERVER['HTTP_CLIENT_IP']:($_SERVER['HTTP_X_FORWARDED_FOR']?$_SERVER['HTTP_X_FORWARDED_FOR']:$_SERVER['REMOTE_ADDR']);
Here is a shorter version that uses the elvis operator
php code
$_SERVER['HTTP_CLIENT_IP']?:($_SERVER['HTTP_X_FORWARDED_FOR']?:$_SERVER['REMOTE_ADDR']);
SOLUTION 5:
- This is the method validates an IPv4 input:
php code
// Get user IP address
if ( isset($_SERVER['HTTP_CLIENT_IP']) && ! empty($_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
}
elseif ( isset($_SERVER['HTTP_X_FORWARDED_FOR']) && ! empty($_SERVER['HTTP_X_FORWARDED_FOR']))
{
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$ip = (isset($_SERVER['REMOTE_ADDR'])) ? $_SERVER['REMOTE_ADDR'] : '0.0.0.0';
}
$ip = filter_var($ip, FILTER_VALIDATE_IP);
$ip = ($ip === false) ? '0.0.0.0' : $ip;
SOLUTION 6:
- Another method of implementation:
php code
$ip = "";
if (!empty($_SERVER["HTTP_CLIENT_IP"])) {
//check for ip from share internet $ip = $_SERVER["HTTP_CLIENT_IP"];
} elseif (!empty($_SERVER["HTTP_X_FORWARDED_FOR"]))
{
// Check for the Proxy User
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
} else
{
$ip = $_SERVER["REMOTE_ADDR"];
}
echo $ip;
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SOLUTION 7:
There are different type of users behind the Internet, So we want to catch the IP address from different potions. They are,
1. $_SERVER[‘REMOTE_ADDR’] – It contains the real IP address of the client. This is the most reliable value we can able to find from the user.
2. $_SERVER[‘REMOTE_HOST’] – It will fetch the Host name from which the user is viewing the current page. But for this script to work, Hostname Lookups On inside httpd.conf must be configured.
3. $_SERVER[‘HTTP_CLIENT_IP’] – It will fetch the IP address when user is from Shared Internet services.
4. $_SERVER[‘HTTP_X_FORWARDED_FOR’] – It will fetch the IP address from the user when he is behind the proxy
php code
// Function to get the user IP address
function getUserIP() { $ipaddress = '';
if (isset($_SERVER['HTTP_CLIENT_IP']))
$ipaddress = $_SERVER['HTTP_CLIENT_IP'];
else if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
$ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
else if(isset($_SERVER['HTTP_X_FORWARDED']))
$ipaddress = $_SERVER['HTTP_X_FORWARDED'];
else if(isset($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']))
$ipaddress = $_SERVER['HTTP_X_CLUSTER_CLIENT_IP'];
else if(isset($_SERVER['HTTP_FORWARDED_FOR']))
$ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
else if(isset($_SERVER['HTTP_FORWARDED']))
$ipaddress = $_SERVER['HTTP_FORWARDED'];
else if(isset($_SERVER['REMOTE_ADDR']))
$ipaddress = $_SERVER['REMOTE_ADDR'];
else
$ipaddress = 'UNKNOWN';
return $ipaddress;
}
SOLUTION 8:
using the GLOBAL variable named as $_SERVER.
the $_SERVER is an array which has an attribute names REMOTE_ADDR.
Just assign it like this $userIp = $_SERVER[‘REMOTE_ADDR’];
or use it directly like echo $_SERVER[‘REMOTE_ADDR’]; or echo ($_SERVER[‘REMOTE_ADDR’]);
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SOLUTION 9:
- We can able to use $_SERVER[‘REMOTE_ADDR’]; to get client IP address and if we need more information about a user, Use below sample code:
php code
<?php
$ip='0.0.0.0';
$ip=$_SERVER['REMOTE_ADDR'];
$clientDetails = json_decode(file_get_contents("http://ipinfo.io/$ip/json"));
echo "You're logged in from: <b>" . $clientDetails->country . "</b>";
?>
- Client’s more specific info goes in $clientDetails. We can able to fetch json items stored in $clientDetails variable in this way: $clientDetails->PostalCode/hostname/region/loc..
SOLUTION 10:
- Here is the another solution to get the ip address
php code
function getClientIP() {
if (isset($_SERVER))
{
if (isset($_SERVER["HTTP_X_FORWARDED_FOR"]))
return $_SERVER["HTTP_X_FORWARDED_FOR"];
if (isset($_SERVER["HTTP_CLIENT_IP"]))
return $_SERVER["HTTP_CLIENT_IP"];
return $_SERVER["REMOTE_ADDR"];
}
if (getenv('HTTP_X_FORWARDED_FOR'))
return getenv('HTTP_X_FORWARDED_FOR');
if (getenv('HTTP_CLIENT_IP'))
return getenv('HTTP_CLIENT_IP');
return getenv('REMOTE_ADDR');
}