Question

我有一个foreach循环，我正在运行JSON数据。 JSON中的一个值是数字：

{
  "apiVersion": "0.1",
  "data": {
    "offset": 0,
    "limit": 50,
    "count": 50,
    "total": 783,
    "reports": [
      {
        "type": "ROOM_CHARGE",
        "data": {
          "datetime": "2014-11-10T11:08:08-08:00",
          "originator": "265a",
          "roomNumber": "265",
          "chargeItem": "Premium Services",
          "chargeAmountCents": 495
        }
      },
      {
        "type": "STB_EVENT_TIMED",
        "data": {
          "datetime": "2014-11-10T10:38:20-08:00",
          "originator": "242b",
          "roomNumber": "242",
          "eventItem": "Watched movie 31008",
          "duration": "P0Y0M0DT0H7M50.827S"
        }
      },
      {
        "type": "ROOM_CHARGE",
        "data": {
          "datetime": "2014-11-10T09:35:37-08:00",
          "originator": "540a",
          "roomNumber": "540",
          "chargeItem": "Premium Services",
          "chargeAmountCents": 495
        }
      },

您会注意到"ROOM_CHARGE"上方"chargeAmountCents": 495。我想运行我的foreach循环并将每个数字加在一起：

请注意我的代码$total。我基本上想要将所有房间费用加在一起，然后在最后回显总计。我可以自己格式化数字，我只是遇到了"+="运算符的问题而不确定它是否应该以这种方式使用？当我"495"时，我一直收到echo $total。

<?php foreach($output1['data']['reports'] as $reporting): ?>
      <?php if($reporting['type'] == "ROOM_CHARGE") : ?>
      <tr>
          <td><?php echo 'Room Charge'; ?></td>
          <td><?php echo substr($reporting['data']['datetime'], -26, 10) ?></td>
          <td><?php echo substr($reporting['data']['datetime'], -14, 8) ?></td>
          <td><?php echo ($reporting['data']['roomNumber']) ?>  </td>
          <td><?php echo ($reporting['data']['originator']) ?>  </td>                            
          <td><?php echo ($reporting['data']['chargeItem']) ?></td>
          <td><?php echo number_format(($reporting['data']['chargeAmountCents'])/100, 2, '.', ',') ?></td> 
          <td>-</td>
          <?php $total = ""; ?> 
          <?php $total += ($reporting['data']['chargeAmountCents']) ?>         
      </tr>

Answer 1

在你的循环中，你正在做<?php $total = ""; ?>。因此，每次循环时，您都重置总数。

您需要设置$total（至0，因为它是一个数字）在循环之外。

<?php $total = 0; ?> 
<?php foreach($output1['data']['reports'] as $reporting): ?>
      <?php if($reporting['type'] == "ROOM_CHARGE") : ?>
      <tr>
          <td><?php echo 'Room Charge'; ?></td>
          <td><?php echo substr($reporting['data']['datetime'], -26, 10) ?></td>
          <td><?php echo substr($reporting['data']['datetime'], -14, 8) ?></td>
          <td><?php echo ($reporting['data']['roomNumber']) ?>  </td>
          <td><?php echo ($reporting['data']['originator']) ?>  </td>                            
          <td><?php echo ($reporting['data']['chargeItem']) ?></td>
          <td><?php echo number_format(($reporting['data']['chargeAmountCents'])/100, 2, '.', ',') ?></td> 
          <td>-</td>
          <?php $total += ($reporting['data']['chargeAmountCents']) ?>         
      </tr>

在PHP中使用“+ =”运算符

1 个答案: