function phpAds_SessionDataDestroy()
{
    global $phpAds_config;
    global $Session;
    if (isset($_COOKIE['sessionID']) && preg_match('/^[0-9a-f]+$/D', $_COOKIE['sessionID'])) {
        // Remove the session data from the database
        phpAds_dbQuery("DELETE FROM " . $phpAds_config['tbl_session'] . " WHERE sessionid='" . addslashes($_COOKIE['sessionID']) . "'");
    }
    // Kill the cookie containing the session ID
    phpAds_setCookie('sessionID', '');
    phpAds_flushCookie();
    // Clear all local session data and the session ID
    $Session = "";
    unset($Session);
    $_COOKIE['sessionID'] = "";
    unset($_COOKIE['sessionID']);
}
/* Main code                                             */
/*********************************************************/
// Determine the user ID
$userid = phpAds_getUniqueUserID(false);
$conversionsid = NULL;
// Send the user ID
// phpAds_setCookie("phpAds_id", $userid, time()+365*24*60*60);
if (!phpAds_isConversionBlocked($trackerid)) {
    if ($phpAds_config['log_adconversions']) {
        phpAds_dbConnect();
        $conversionid = phpAds_logConversion($userid, $trackerid);
    }
    // Handles variable retrieval from the page
    echo phpAds_buildJavascriptVariablesScript($trackerid, $conversionid);
    // Send block cookies
    phpAds_updateConversionBlockTime($trackerid);
}
phpAds_updateGeotracking($phpAds_geo);
phpAds_flushCookie();
/*
header ("Content-Type: image/gif");
header ("Content-Length: 43");

// 1 x 1 gif
echo chr(0x47).chr(0x49).chr(0x46).chr(0x38).chr(0x39).chr(0x61).chr(0x01).chr(0x00).
     chr(0x01).chr(0x00).chr(0x80).chr(0x00).chr(0x00).chr(0x04).chr(0x02).chr(0x04).
 	 chr(0x00).chr(0x00).chr(0x00).chr(0x21).chr(0xF9).chr(0x04).chr(0x01).chr(0x00).
     chr(0x00).chr(0x00).chr(0x00).chr(0x2C).chr(0x00).chr(0x00).chr(0x00).chr(0x00).
     chr(0x01).chr(0x00).chr(0x01).chr(0x00).chr(0x00).chr(0x02).chr(0x02).chr(0x44).
     chr(0x01).chr(0x00).chr(0x3B);
*/
function phpAds_SessionDataDestroy()
{
    global $phpAds_config;
    global $HTTP_COOKIE_VARS, $Session;
    // Remove the session data from the database
    phpAds_dbQuery("DELETE FROM " . $phpAds_config['tbl_session'] . " WHERE sessionid='" . $HTTP_COOKIE_VARS['sessionID'] . "'");
    // Kill the cookie containing the session ID
    phpAds_setCookie('sessionID', '');
    phpAds_flushCookie();
    // Clear all local session data and the session ID
    $Session = "";
    unset($Session);
    $HTTP_COOKIE_VARS['sessionID'] = "";
    unset($HTTP_COOKIE_VARS['sessionID']);
}