Question

我试图访问多维数组，并附加到其子键，但很难想出一个函数来执行此操作。

目前我的数组看起来像这样，键是文件夹的parent_id。

array (size=3)
  0 => 
    object(stdClass)[25]
      public 'id' => string '18' (length=2)
  18 => 
    array (size=3)
      19 => 
        object(stdClass)[28]
          public 'id' => string '19' (length=2)
      20 => 
        object(stdClass)[29]
          public 'id' => string '20' (length=2)
      21 => 
        object(stdClass)[30]
          public 'id' => string '21' (length=2)
  19 => 
    array (size=1)
      24 => 
        object(stdClass)[31]
          public 'id' => string '24' (length=2)

我尝试过的事情：

function getChildren($folder_id)
    {
        $folder_cursor = $this->db->get_where("folder", array("id" => $folder_id));
        if ($folder_cursor->num_rows() > 0) {
            $row = $folder_cursor->row();
            array_push($this->temp, $row);
            $this->recursiveGetChildren($row->id);
        }
    }

    function recursiveGetChildren($parent_id)
    {
        $q = $this->db->get_where("folder", array("parent" => $parent_id));
        if ($q->num_rows() > 0) {
            $this->temp[$parent_id] = array();
            foreach($q->result() as $q) {
                $this->temp[$parent_id][$q->id] = $q;
                $this->recursiveGetChildren($q->id);
            }
        }
    }

我希望数组看起来像这样：

array (size=3)
  0 => 
    object(stdClass)[25]
      public 'id' => string '18' (length=2)
  18 => 
    array (size=3)
      19 => 
        array (size=2)
         0=> 
          object(stdClass)[28]
              public 'id' => string '19' (length=2)
         24 => 
            object(stdClass)[31]
             public 'id' => string '24' (length=2)
      20 => 
        object(stdClass)[29]
          public 'id' => string '20' (length=2)
      21 => 
        object(stdClass)[30]
          public 'id' => string '21' (length=2)

为了清晰而编辑。

Answer 1

您的结构如下：

array(
    "child_id" => array(
        "sub_child_id" => array();
    ),
    "child_id_2" => array(
        "sub_child_id_2" => array(
            sub_sub_child_id => array();
        );
    ),
);

表示以下内容：

$array[ $a[ $aa[ ] ], $b[ $bb[ $bbb[ ] ] ] ]

然后，对于每个数组来说，元素本身就是一个数组数组。第n个深度

尝试array_walk_recursive()）：

<?php
$sweet = array('a' => 'apple', 'b' => 'banana');
$fruits = array('sweet' => $sweet, 'sour' => 'lemon');

function test_print($item, $key)
{
    echo "$key holds $item\n";
}

array_walk_recursive($fruits, 'test_print');
?>

<强>实施

PHP按键附加到多维数组

1 个答案: