Save IP in PHP (looks like kwejk, demotywatory etc.)

<?php
////////////////////////////////////////////////////////////
//////// script created by Shady on GNU/GPL license ////////
////////  gg 15530223 | mail izzypjchamp@gmail.com  ////////
////////////////////////////////////////////////////////////

/**************** DATABASE : idiots *****************
field: id (int 11) auto_increment PRIMARY
field: time (int 11)
field: ip (varchar 18)
field: agent (text)
*****************************************************/

$title = 'Image title';
$srcimg = 'http://site.com/image.png';

echo '
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
    <head>
        <title>'.$title.'</title>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
        <meta http-equiv="content-language" content="en" />
        <meta name="description" content="Śmieszne obrazki i codzienna dawka humoru!" />
        <meta name="keywords" content="kwejk, demotywatory, obrazki, memy" />
        <meta http-equiv="pragma" content="no-cache" />
        <meta name="robots" content="none" />
    </head>
<body>
<img src="'.$srcimg.'" alt="'.$title.'" title="'.$title.'" />
';

function true_ip() {
    if(isset($_SERVER['HTTP_CLIENT_IP'])) $ip = $_SERVER['HTTP_CLIENT_IP'];
    elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else $ip = $_SERVER['REMOTE_ADDR'];

    return $ip;
}

try {
    $db = new PDO ('mysql:host=localhost;dbname=base_name;encoding=utf8', 'user', 'pass');
    $db -> setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $db -> exec("INSERT INTO idiots (time, ip, agent) VALUES ('".date('d.m.y H:i:s')."', '".true_ip()."', '".$_SERVER['HTTP_USER_AGENT']."')");
    }
catch(PDOException $error) {
    exit('Error communicating with the database!<br/>'.$error);
    }
?>
</body>
</html>