public static function app()
{
if (self::$instance == null) {
self::$instance = new self();
}
return self::$instance;
}
public function modNum($goods_id, $goods_num)
{
// 先判断是否存在
if (!$this->isEexit($goods_id)) {
return;
}
// 判断num
if ($goods_num <= 1) {
$goods_num = 1;
}
// 获得商品的库存量
$mg = new ModelGoods('bl_goods');
$total = $mg->getOne("select goods_total from bl_goods where goods_id=" . $goods_id);
if ($goods_num >= $total) {
$goods_num = $total;
}
$this->items[$goods_id]['num'] = $goods_num;
}