$cart = $do->get();
$max_cart = $MOD['max_cart'];
if ($action == 'ajax') {
$itemid or exit('-1');
$s1 = isset($s1) ? intval($s1) : 0;
$s2 = isset($s2) ? intval($s2) : 0;
$s3 = isset($s3) ? intval($s3) : 0;
$key = $itemid . '-' . $s1 . '-' . $s2 . '-' . $s3;
if (strpos($cart . ',', ',' . $key . ',') !== false) {
exit('-2');
}
$item = $db->get_one("SELECT itemid,status,username FROM {$table} WHERE itemid={$itemid}");
if ($item && $item['status'] == 3) {
if ($item['username'] != $_username) {
$cart = ',' . $key . $cart;
$do->set($cart);
exit('1');
} else {
exit('-4');
}
} else {
exit('-3');
}
} else {
if ($action == 'clear') {
$key = isset($key) ? trim($key) : '';
if (preg_match("/^[0-9]{1,}-[0-9]{1,}-[0-9]{1,}-[0-9]{1,}\$/", $key)) {
$cart = str_replace(',' . $key . ',', ',', $cart . ',');
if (substr($cart, -1) == ',') {
$cart = substr($cart, 0, -1);
}