WTF

<?php
/**
 * Redirect-Script
 *
 * Aufgabe:
 * - Umgebungsdaten ermitteln
 * -- Cookie gesetzt?
 * -- Cookie übergeben?
 */
// definierte Werte die per se für mich gelten und von der Generator-Routine gesetzt werden
define('CustomerID', '323');
define('TagID', '891');

define('COOKIE_NAME', 'axd');

if (!defined('COOKIE_DOMAIN')) {
    define('COOKIE_DOMAIN', '.theadex.com');
}
define('TS_DMPSTART', 1378591200);

function _schemaExplode($a) {
    $ud = array();
    while (list($k,$v) = each($a)) {
        if (strpos($v, ':') > 0) {
            list($Sub, $Time) = explode(":", $v);
            $ud[$Sub] = $Time;
        }
    }
    return $ud;
}

function _schemaImplode($a) {
    $ud = array();
    while (list($k, $time) = each($a)) {
        $ud[] = $k.':'.$time;
    }
    return $ud;
}

/**
 * Converts a timestamp to adex-days
 *
 * @param integer $timestamp
 *
 * @return integer
 */
function toAdexDays($timestamp) {
    return floor(($timestamp - TS_DMPSTART) / (60*60*24));
}

/**
 * Converts from adex days to a unix timestamp
 *
 * @param integer $AdexDays
 *
 * @return integer
 */
function fromAdexDays($AdexDays) {
    return floor(TS_DMPSTART + ($AdexDays * 60*60*24));
}

/**
 * Speichert zeitbezogene Zustandsdaten in einem Cookie - getrennt nach $key; separiert per | und :
 * @param string  $key  SubIdentifier
 * @param integer $days Gültigkeitsdauer
 *
 * @return boolean
 */
function stateInformationOlderThan($key, $days, $setState = false) {
    $now = toAdexDays(time());
    $expected = $now  + $days;
    $Cookie = 'tis';
    $SubParts = array();
    if (isset($_COOKIE[$Cookie])) {
        // nach schema zerhacken
        $parts = explode("|", $_COOKIE[$Cookie]);
        $SubParts = _schemaExplode($parts);

        if (isset($SubParts[$key]) && $SubParts[$key] * 1 > $now) {
            return false;
        }
    }

    if ($setState) {
        $SubParts[$key] = $expected;

        $implode = array();
        $implode = _schemaImplode($SubParts);
        setcookie($Cookie, join("|", $implode), fromAdexDays($now + 3000), '/', COOKIE_DOMAIN, false, false);
        $_COOKIE[$Cookie] = join("|", $implode);
    }

    return true;
}

if (isset($_SERVER['QUERY_STRING'])) {
    define("QS", substr($_SERVER['QUERY_STRING'], 0, 1) == '?' ? substr($_SERVER['QUERY_STRING'], 1) : $_SERVER['QUERY_STRING']);
} else {
    define("QS", "");
}

if (isset($_GET['c']) && trim($_GET['c']) !== '') {
    define('COOKIE', $_GET['c']);
} elseif (!empty($_COOKIE[COOKIE_NAME])) {
    define('COOKIE', $_COOKIE[COOKIE_NAME]);
} else {
    // kein Cookie, kein redirect
    ?>
    <html><head></head><body></body></html>
    <?php
    exit;
}

$SSLon = false;
if (!empty($_SERVER['HTTPS'])) {
    $SSLon = true;
}

if(isset($_SERVER['HTTP_X_PROTO']) && $_SERVER['HTTP_X_PROTO'] == 'SSL') {
    $SSLon = true;
}

header('P3P:CP="CAO PSA OUR"');
ob_start();
if (!$SSLon) {
    # no SSL
    ?>
    <html>
        <body>
            <?php if (stateInformationOlderThan("EP2",7)) { ?>
<img width='1' height='1' src='http://c1.adform.net/serving/cookie/match/?party=1010&adx_id=323' />
<?php } ?>
<?php if (stateInformationOlderThan("EP14",7)) { ?>
<img width='1' height='1' src='http://dsp.adfarm1.adition.com/cookie/?redirect=http%3A%2F%2Fdmp.theadex.com%2Fd%2F323%2Fi%2F2.gif%3Fc%3D<?= COOKIE ?>%26axd_pid%3D14%26axd_fuid%3D%25%25COOKIE%25%25' />
<?php } ?>
        </body>
    </html>
    <?php
} else {
    # SSL
    ?>
    <html>
        <body>
            <?php if (stateInformationOlderThan("EP2",7)) { ?>
<img width='1' height='1' src='https://c1.adform.net/serving/cookie/match/?party=1010&adx_id=323' />
<?php } ?>
<?php if (stateInformationOlderThan("EP14",7)) { ?>
<img width='1' height='1' src='https://dsp.adfarm1.adition.com/cookie/?redirect=https%3A%2F%2Fdmp.theadex.com%2Fd%2F323%2Fi%2F2.gif%3Fc%3D<?= COOKIE ?>%26axd_pid%3D14%26axd_fuid%3D%25%25COOKIE%25%25' />
<?php } ?>
        </body>
    </html>
    <?php
}
ob_end_flush();