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如何使用相同的方法通过 foreach 循环发送多个字段值ID？

这段 HTML 代码有什么问题？

<input type="text" size="3" name="new_quantity[<?php echo $product_id; ?>]" value="<?php echo $product_quantity; ?>" />
<input type="text" name="totalcost[<?php echo $product_id; ?>]" value="<?php $total_cost; ?>"  />

现在PHP代码

foreach($_REQUEST['new_quantity'] as  $key => $quantity) {
    foreach($_REQUEST['totalcost'] as $key => $total) {
        $sql=mysql_query("UPDATE `categories`.`carts` SET `product_quantity` = '$quantity',                `product_totalcost` = '$total' WHERE `carts`.`product_id` ='$key' AND  cart_session='$sessionID'");
    }
}
4

2 回答 2

0

循环内的循环将为您提供 n*n 次更新查询

但你实际上需要更新查询 n 次

所以这样做：

$pids     = array_keys($_REQUEST['new_quantity']); /// here you will get all product_ids

for($i=0; $i<count($_REQUEST['new_quantity']);$i++){
   echo $_REQUEST['new_quantity'][$pids[$i]]; // this quantity
   echo $_REQUEST['totalcost'][$pids[$i]]; // total cost
   echo $pids[$i]; // product id

   /// add your update query here all details you need in query are echoed above.
}
于 2013-02-28T12:35:41.163 回答
-1

尝试做一件事为数量制作一个数组，为成本制作一个数组

喜欢

$qt=array();
foreach($_REQUEST['new_quantity'] as  $key => $quantity) {
$qt[].=$quantity;
}

$ct=array();
foreach($_REQUEST['totalcost'] as $key => $total) {
$ct[].=$total;
}

然后在 for 循环中触发更新查询

于 2013-02-28T12:40:37.507 回答