如何在另一个数组中访问数组的元素

Question

我有以下数组，其中包含一个数组:

Array
(
[title] => SwB Skipper
[today] => 08/11/2016
[crew_name] => Array
    (
        [0] => Array
            (
                [name] => Bob S
            )
        [1] => Array
            (
                [name] => Janet 
            )
        [2] => Array
            (
                [name] => Perry S
            )
        [3] => Array
            (
                [name] => Vinay N
            )
        [4] => Array
            (
                [name] => Pace W
            )

这个数组叫做$values;

我做一个:

extract($values);

然后尝试用

访问$crew_name['name']元素

<?php foreach ($crew_name['name'] as $crew): ?>
          <option value = "<?php echo $crew['name']; ?>" > 
          <?php echo $crew['name']; ?> </option>
<?php endforeach ?> 

Answer 1

您还没有准备好在$crew_name的顶层使用['name']键。$crew_name只有数字键，所以你只需要

<?php foreach ($crew_name as $crew): ?>

Answer 2

假设$values是主数组试试:

foreach($values as $val){
    foreach($val["crew_name"] as $crew){
        echo $crew["name"];
    }
}

Answer 3

您可以简单地使用aray_column()函数并使您的多数组成为紧凑的单维数组。这会使事情简单得多。

试试这个:

<select>
  <?php
      $options = array_column($values["crew_name"], "name");
      foreach($options as $option) {    
   ?>
    <option value = "<?php echo $option; ?>" > 
      <?php echo $option; ?> 
    </option>
   <?php } ?>
</select>