PHP 表格 post 提交 接受

    <form action="<?php  echo site_url('home/order/sned_order'); ?>" method="post" >
    <table class='cart-table' border=0>
            <thead>
                <tr>
                    <th width='35%'>项目</th>
                    <th width='15%'>状态</th>
                    <th width='15%'>类型/数量</th>
                    <th width='10%'>单价</th>
                    <th width='10%'>小计</th>
                    <th width='10%'>操作</th>
                </tr>
            </thead>
        
                <?php  for($i=0;$i<count($db_cart);$i++){?>
                        <tr>
                            <td>
                                <a href="<?php echo site_url('home/index/goods_info/'.$db_cart[$i]['goods_id']); ?>"><?php echo $db_cart[$i]['name']; ?></a>
                            </td>
                            <td>未支付</td>
                            <td class='goods-num'>
                                <a href="#" class='reduce' ss="<?php echo  $db_cart[$i]['goods_id'] ?>" id="reduce_<?php echo $db_cart[$i]['id']; ?>"></a>
                                <input class="val_num" ss="<?php echo  $db_cart[$i]['goods_id'] ?>" id="num_<?php echo $db_cart[$i]['id']; ?>" type="text" value="<?php echo $db_cart[$i]['goods_num']; ?>"  /> 
                                <a href="#"  class='add' ss="<?php echo  $db_cart[$i]['goods_id'] ?>" id="add_<?php echo $db_cart[$i]['id']; ?>"></a>
                            </td>
                            <td ><span style="margin-left:15px;" id="price_<?php echo $db_cart[$i]['id']; ?>"><?php echo $db_cart[$i]['price']; ?></span></td>
                            <td ><span style="margin-left:10px;" class="sum_money_<?php echo $i+1 ?>  index_money" id="sum_<?php echo $db_cart[$i]['id']; ?>"><?php echo $db_cart[$i]['price']*$db_cart[$i]['goods_num']; ?></span></td>
                        <td ><a href="#" style="margin-left:10px;">删除</a></td>
                        </tr>
                        <input type="hidden" id="shop_id"   name="shop_id[]" value="<?php echo $db_cart[$i]['goods_id']; ?>" />
                        
                <?php } ?>
                <tr>
                    <td colspan="6" style="text-align: right;"><span id="count_money" style="font-size:16px;color:red;margin-right:15px;">总金额:&nbsp;&nbsp;￥<strong ><span id="count_sum_money"></span></strong></span></td>
                    <input type="hidden" id="shop_sum_money" name="shop_sum_money"   />
                </tr>
            </tbody>
        </table>
</form>

---------------------------------------------------

Array
(
    [shop_id] => Array
        (
            [0] => 5
            [1] => 4
        )
)