Question

我正在访问json解码数组

$orders = json_decode($response, true);

然后在一个名为DATA的数组中，我将浏览每个订单并找到Total键。

// access the common array
$orders = $orders['data'];

// access the total of each order
$sale1 = $orders[0]['total'];
$sale2 = $orders[1]['total'];
$sale3 = $orders[2]['total'];
$sale4 = $orders[3]['total'];
$sale5 = $orders[4]['total'];
$sale6 = $orders[5]['total'];
$sale7 = $orders[6]['total'];

然后我将它们相加以获得所有订单的总和。

// add up all orders to find total
echo $sale1 + $sale2 + $sale3 + $sale4 + $sale5 + $sale6

我无法弄清楚如何将其变成循环。

这是我的阵列：

array(3) {

   [0]=>
   array(53) {
    ["total"]=>
     int(100)
    }

   [1]=>
   array(53) {
    ["total"]=>
     int(100)
    }

}

Answer 1

你可以做 -

$total = 0;
foreach($orders as $key => $order) {
    $total += $order['total']; // add up the total
}

echo $total;

或者，如果您有最新版本或大于5.5.0 PHP版本，则

echo array_sum(array_column($orders, 'total'));

Answer 2

您可以使用for循环在$ orders中指定索引键。

$temp = json_decode($response, true);
$orders = $temp['data'];
$len = count($orders);

for($i=0; $i < $len; $i++)
{
    $total += $orders[$i]['total'];
}

echo $total;

Answer 3

假设您有以下数组

$arr = array('0'=>array("total"=>100),
      '1'=>array("total"=>100),
        '2'=>array("total"=>100),
        '3'=>array("total"=>100),
        '4'=>array("total"=>100),
        '5'=>array("total"=>100),
        '6'=>array("total"=>100));

并且您想使用循环添加值然后使用以下语句

$total = 0;
foreach($arr as $key=>$val)
{
    $total += $val['total'];
}

echo $total;//it will return 700 which is total value.

使用PHP循环遍历数组中的特定键

3 个答案: