Foreach不显示多维数组中的所有项目

时间：2018-04-07 04:44:10

标签： php arrays multidimensional-array foreach

这是我长期以来的第一个问题，非常感谢任何帮助！

我有一个存储车辆的数据库和一个存储他们图像的数据库。我正在使用INNER JOIN来获取车辆及其图像列表。在数据库查询之后，我把返回数组;所以2个数组在1个数组中：

return array($vehicles, $vehicle_images);

当我做print_r时，我得到正确的回报：

<?php print_r($your_listings[0]); ?>
<br />
<?php print_r($your_listings[1]); ?>

返回：

Array
(
    [0] => Array
        (
            [vehicle_id] => 35
            [vehicle_type] => jeep
            [vehicle_vin] => 6969
            [owner_email] => user@user.com
            [vehicle_make] => Jeep
            [vehicle_year] => 2008
            [vehicle_model] => cherokee
        )

    [1] => Array
        (
            [vehicle_id] => 36
            [vehicle_type] => motorcycle
            [vehicle_vin] => 1234
            [owner_email] => user@user.com
            [vehicle_make] => honda
            [vehicle_year] => 2018
            [vehicle_model] => random
        )

    [2] => Array
        (
            [vehicle_id] => 39
            [vehicle_type] => atv
            [vehicle_vin] => 3215
            [owner_email] => user@user.com
            [vehicle_make] => Yamaha
            [vehicle_year] => 1990
            [vehicle_model] => OHYEA
        )

)

Array
(
    [0] => Array
        (
            [vehicle_id] => 35
            [image_display] => placeholder
        )

    [1] => Array
        (
            [vehicle_id] => 36
            [image_display] => /new/images/vehicles/users/42/image.jpg
        )

    [2] => Array
        (
            [vehicle_id] => 36
            [image_display] => /new/images/vehicles/users/42/vehicle1.jpg
        )

    [3] => Array
        (
            [vehicle_id] => 35
            [image_display] => /new/images/vehicles/users/42/vehicle.jpg
        )

    [4] => Array
        (
            [vehicle_id] => 39
            [image_display] => placeholder
        )

)

现在当我做一个foreach（包括bootstrap 4样式）时，它只显示2辆车而不是3辆;它显示的2辆车似乎完全符合我的要求：

<div class="container-fluid">
 <div class="row no-gutters">
<?php
$your_listings = owner_listings($_SESSION['user']);

if (!($your_listings[0])) {
  echo '<div class="col-sm"><div class="alert alert-danger" role="alert"><i class="fas fa-exclamation"></i> You do not have any listings active at this time.</div></div>';
}
else {
 foreach ($your_listings as $i => $item) {
  $make = $your_listings[0][$i]['vehicle_make'];
  $model = $your_listings[0][$i]['vehicle_model'];
  $year = $your_listings[0][$i]['vehicle_year'];
  $vehicle = $your_listings[0][$i]['vehicle_id'];
  $image = $your_listings[1][$i]['image_display'];
    if ($image != 'placeholder') {
      echo '<div class="col-sm"><div class="card" style="width: 18rem;">
            <h5 class="card-title text-center font-weight-bold">'.$year.' '.$make.' '.$model.'</h5>
            <img class="card-img-top" src="'.$image.'" alt="'.$year.' '.$make.' '.$model.'">
            <div class="card-body">
              <a href="#" class="btn btn-primary edit_button" value="'.$vehicle.'" id="'.$vehicle.'" data-vehicle="'.$vehicle.'">Edit</a>
            </div>
            </div></div>';
          }
          else {
            if ($your_listings[0][$i]['vehicle_type'] == 'atv') {
              $image = '/new/images/vehicles/types/atv.png';
              }
            elseif ($your_listings[0][$i]['vehicle_type'] == 'jeep') {
              $image = '/new/images/vehicles/types/jeep.png';
              }
            elseif ($your_listings[0][$i]['vehicle_type'] == 'motorcycle') {
              $image = '/new/images/vehicles/types/motorchycle.png';
              }
            echo '<div class="col-sm"><div class="card" style="width: 18rem;">
            <h5 class="card-title text-center font-weight-bold">'.$year.' '.$make.' '.$model.'</h5>
            <img class="card-img-top" src="'.$image.'" alt="'.$year.' '.$make.' '.$model.'">
            <div class="card-body">
              <a href="#" class="btn btn-primary edit_button" value="'.$vehicle.'" id="'.$vehicle.'" data-vehicle="'.$vehicle.'">Edit</a>
            </div>
            </div></div>';
          }
        }
  }
  ?>

</div>
</div>

我刚刚盯着这个太久了吗？我究竟做错了什么？任何帮助表示赞赏。

谢谢！

2 个答案:

答案 0 :(得分：1)

你正在循环原始数组，它有两个数组，如你所说。你想要的只是循环通过your_listings数组的第一个元素来获得三辆车

if (!($your_listings[0])) {
  echo '<div class="col-sm"><div class="alert alert-danger" role="alert"><i class="fas fa-exclamation"></i> You do not have any listings active at this time.</div></div>';
}
else {
foreach ($your_listings as $i => $item) {    // should be foreach ($your_listings[0] as $i => $item) {
$make = $item['vehicle_make'];
$model = $item['vehicle_model'];

答案 1 :(得分：1)

尝试这个答案...... 

<div class="container-fluid">
    <div class="row no-gutters">
    <?php
        $your_listings = owner_listings($_SESSION['user']);

        if (!($your_listings[0])) 
        {
          echo '<div class="col-sm"><div class="alert alert-danger" role="alert"><i class="fas fa-exclamation"></i> You do not have any listings active at this time.</div></div>';
        }
        else 
        {
            $newarray = array();
            foreach($your_listings[0] as $i => $item)
            {
                $newarray[$item["vehicle_id"]] = $item["image_display"];
            }
            foreach ($your_listings[0] as $i => $item) 
            {
              $make = $item['vehicle_make'];
              $model = $item['vehicle_model'];
              $year = $item['vehicle_year'];
              $vehicle = $item['vehicle_id'];         
              $image = $newarray[$vehicle];
                if ($image != 'placeholder') 
                {
                    echo '<div class="col-sm"><div class="card" style="width: 18rem;">
                        <h5 class="card-title text-center font-weight-bold">'.$year.' '.$make.' '.$model.'</h5>
                        <img class="card-img-top" src="'.$image.'" alt="'.$year.' '.$make.' '.$model.'">
                        <div class="card-body">
                          <a href="#" class="btn btn-primary edit_button" value="'.$vehicle.'" id="'.$vehicle.'" data-vehicle="'.$vehicle.'">Edit</a>
                        </div>
                        </div></div>';
                }
                else 
                {
                    if ($item['vehicle_type'] == 'atv') {
                      $image = '/new/images/vehicles/types/atv.png';
                      }
                    elseif ($item['vehicle_type'] == 'jeep') {
                      $image = '/new/images/vehicles/types/jeep.png';
                      }
                    elseif ($item['vehicle_type'] == 'motorcycle') {
                      $image = '/new/images/vehicles/types/motorchycle.png';
                      }
                    echo '<div class="col-sm"><div class="card" style="width: 18rem;">
                    <h5 class="card-title text-center font-weight-bold">'.$year.' '.$make.' '.$model.'</h5>
                    <img class="card-img-top" src="'.$image.'" alt="'.$year.' '.$make.' '.$model.'">
                    <div class="card-body">
                      <a href="#" class="btn btn-primary edit_button" value="'.$vehicle.'" id="'.$vehicle.'" data-vehicle="'.$vehicle.'">Edit</a>
                    </div>
                    </div></div>';
                }
            }
        }
    ?>
    </div>
</div>
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