Question

我的嵌套数组如下：

array (
  0 => 
  array (
    'id' => 1,
    'category_name' => 'Vehicle',
    0 => 
    array (
      'id' => 4,
      'category_name' => 'Bmw',
      0 => 
      array (
        'id' => 5,
        'category_name' => 'Mercedes',
        0 => 
        array (
          'id' => 6,
          'category_name' => 'Bmw X7',
        ),
      ),
    ),
  ),
  1 => 
  array (
    'id' => 2,
    'category_name' => 'TV',
    0 => 
    array (
      'id' => 8,
      'category_name' => 'Led TV',
      0 => 
      array (
        'id' => 9,
        'category_name' => 'Philips',
      ),
    ),
  ),
  2 => 
  array (
    'id' => 3,
    'category_name' => 'Phone',
    0 => 
    array (
      'id' => 10,
      'category_name' => 'Samsung',
    ),
  ),
)

我的代码如下：

public function index($id)
{

$categories= array(
            array('id' => 1 , 'category_name' => 'Vehicle', array('id' => 4 , 'category_name' => 'Bmw',array('id' => 5 , 'category_name' => 'Mercedes' , array('id' => 6 , 'category_name' => 'Bmw X7')))),
            array('id' => 2 , 'category_name' => 'TV', array('id' => 8 , 'category_name' => 'Led TV' , array('id' => 9 , 'category_name' => 'Philips'))),
            array('id' => 3 , 'category_name' => 'Phone' , array('id' => 10 , 'category_name' => 'Samsung'))
        );
    foreach ($categories as $row)
          {
              if($row['id'] == $id)
              {
                 $parent_category = $row;
                 break;
              }
          }
}

我可以达到第一个数组ID值。我想在里面得到id值。我期待你的帮助，非常感谢你。

Answer 1

不知何故，我想出了你想要的东西，你需要在第一个循环中有另一个foreach循环：

foreach ($categories as $row) {
echo $row["id"];
  foreach ($row as $key => $value) {
    echo $value["id"];
  }
}

Answer 2

解决问题如下：

    $result   = array();
    $search   = 'id';
    $iterator = new RecursiveIteratorIterator(
        new RecursiveArrayIterator(
            $categories,
            RecursiveArrayIterator::CHILD_ARRAYS_ONLY
        )
    );

    foreach($iterator as $key=>$value)
    {
        if($search==$key && $value!=='')
        {
            if($value == 10){
                $result[] = array($key => $value);
                break;
            }

        }
    }

如何获取嵌套数组中的任何ID号？

2 个答案: