PHPNOIP

<?php
//TIME TO LIVE IN SECONDS [DEFAUL IS 0]
const TIME = 60;
if (!function_exists('apc_exists'))
    {
        function apc_exists($key) { return (boolean)apc_fetch($key); }
    }
if(!empty($_GET["op"]) && !empty($_GET["name"]))
    {
    if($_GET["op"]=='set')
        {
        /* GET REMOTE IP IN A BETTER WAY */
        if (!empty($_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'];
            }
        /* IF ID NOT DEFINED (NO ENTRYS) THEN DEFINE AND PUT VALUE 1*/
        if(!apc_exists('id'))
            {
                $id = 1;
                apc_store('id', $id,TIME);
            }
        else
            {
                $id = apc_fetch('id');
                $id = (int) $id + 1;
                apc_store('id', $id,TIME);
            }
            /* STORE NAME AND IP IN RETRIVABLE PAIRS */

            $key = 'name_' . $id;
            apc_store($key, $_GET["name"],TIME);
            $key = 'ip_' . $id;
            // NOT WORKING, STORE IS NOT OVERWRITEING AND DELETE IS NOT DELETING
            apc_delete($key);
            apc_store($key, $ip,TIME);
        }
    }
if($_GET["op"]=='get')
    {
        if(!apc_exists('id'))
            {
                echo "NONE";
            }
        else
            {
                $id = apc_fetch('id');
                    for ($i = 1; $i <= $id; $i++)
                        {
                            $key = 'name_' . $i;
                            $tmp = apc_fetch($key);
                            if ($tmp == $_GET["name"])
                                {
                                    $key = 'ip_' . $i;
                                    $tmp = apc_fetch($key);
                                    echo $tmp;
                                }
                        }
            }
    }
if($_GET["op"]=='lst')
    {
                if(!apc_exists('id'))
            {
                echo "NONE";
            }
        else
            {
                $id = apc_fetch('id');
                    for ($i = 1; $i <= $id; $i++)
                        {
                            $key = 'name_' . $i;
                            $tmp = apc_fetch($key);
                            if(apc_exists($key))
                                echo $tmp, '•';
                        }
            }
    }
?>