get-client-ip-address.php

<?php

function getClientIpWithServer() {
    $ipaddress = '';
    if (isset($_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;
}

function getClientIpWithGetEnv() {
    $ipaddress = '';
    if (isset(getenv['HTTP_CLIENT_IP']))
        $ipaddress = getenv['HTTP_CLIENT_IP'];
    else if(isset(getenv['HTTP_X_FORWARDED_FOR']))
        $ipaddress = getenv['HTTP_X_FORWARDED_FOR'];
    else if(isset(getenv['HTTP_X_FORWARDED']))
        $ipaddress = getenv['HTTP_X_FORWARDED'];
    else if(isset(getenv['HTTP_X_CLUSTER_CLIENT_IP']))
        $ipaddress = getenv['HTTP_X_CLUSTER_CLIENT_IP'];
    else if(isset(getenv['HTTP_FORWARDED_FOR']))
        $ipaddress = getenv['HTTP_FORWARDED_FOR'];
    else if(isset(getenv['HTTP_FORWARDED']))
        $ipaddress = getenv['HTTP_FORWARDED'];
    else if(isset(getenv['REMOTE_ADDR']))
        $ipaddress = getenv['REMOTE_ADDR'];
    else
        $ipaddress = 'UNKNOWN';
    return $ipaddress;
}

?>