PHP 数组，将数组项的深度递归附加到键为“深度”的数组中

Question

根据最底部的示例数组，我希望能够在数组内部附加每个嵌入数组的深度。 例如：

    array (
      53 => 
      array (
        'title' => 'Home',
        'path' => '',
        'type' => '118',
        'pid' => 52,
        'hasChildren' => 0,
      ),

根据下面所示的示例数组，深度为 1，因此它现在应该如下所示：

    array (
      53 => 
      array (
        'title' => 'Home',
        'path' => '',
        'type' => '118',
        'pid' => 52,
        'hasChildren' => 0,
        'depth' => 1,
      ),

等等...

我所做的所有递归数组函数尝试都非常令人尴尬。 不过我看过 RecursiveArrayIterator 它有 getDepth 函数。 我对如何将其附加到当前数组感到困惑......非常感谢任何帮助，谢谢。

 
  array (
    'title' => 'Website Navigation',
    'path' => '',
    'type' => '115',
    'pid' => 0,
    'hasChildren' => 1,
    'children' => 
    array (
      53 => 
      array (
        'title' => 'Home',
        'path' => '',
        'type' => '118',
        'pid' => 52,
        'hasChildren' => 0,
      ),
      54 => 
      array (
        'title' => 'Features',
        'path' => 'features',
        'type' => '374',
        'pid' => 52,
        'hasChildren' => 1,
        'children' => 
        array (
          59 => 
          array (
            'title' => 'artistic',
            'path' => 'features/artistic',
            'type' => '374',
            'pid' => 54,
            'hasChildren' => 1,
            'children' => 
            array (
              63 => 
              array (
                'title' => 'galleries',
                'path' => 'features/artistic/galleries',
                'type' => '374',
                'pid' => 59,
                'hasChildren' => 1,
                'children' => 
                array (
                  65 => 
                  array (
                    'title' => 'graphics',
                    'path' => 'features/artistic/galleries/graphics',
                    'type' => '118',
                    'pid' => 63,
                    'hasChildren' => 0,
                  ),
                  67 => 
                  array (
                    'title' => 'mixed medium',
                    'path' => 'features/artistic/galleries/mixed-medium',
                    'type' => '118',
                    'pid' => 63,
                    'hasChildren' => 0,
                  ),
                  64 => 
                  array (
                    'title' => 'overview',
                    'path' => 'features/artistic/galleries',
                    'type' => '118',
                    'pid' => 63,
                    'hasChildren' => 0,
                  ),
                  68 => 
                  array (
                    'title' => 'photography',
                    'path' => 'features/artistic/galleries/photography',
                    'type' => '118',
                    'pid' => 63,
                    'hasChildren' => 0,
                  ),
                  66 => 
                  array (
                    'title' => 'traditional',
                    'path' => 'features/artistic/galleries/traditional',
                    'type' => '118',
                    'pid' => 63,
                    'hasChildren' => 0,
                  ),
                ),
              ),
              62 => 
              array (
                'title' => 'overview',
                'path' => 'features/artistic',
                'type' => '118',
                'pid' => 59,
                'hasChildren' => 0,
              ),
              69 => 
              array (
                'title' => 'tutorials',
                'path' => 'features/artistic/tutorials',
                'type' => '374',
                'pid' => 59,
                'hasChildren' => 1,
                'children' => 
                array (
                  71 => 
                  array (
                    'title' => 'by category',
                    'path' => 'features/artistic/tutorials/by-category/',
                    'type' => '118',
                    'pid' => 69,
                    'hasChildren' => 0,
                  ),
                  72 => 
                  array (
                    'title' => 'by date',
                    'path' => 'features/artistic/tutorials/by-date/',
                    'type' => '118',
                    'pid' => 69,
                    'hasChildren' => 0,
                  ),
                  70 => 
                  array (
                    'title' => 'overview',
                    'path' => 'features/artistic/tutorials',
                    'type' => '118',
                    'pid' => 69,
                    'hasChildren' => 0,
                  ),
                ),
              ),
            ),
          ),
          58 => 
          array (
            'title' => 'overview',
            'path' => 'features',
            'type' => '118',
            'pid' => 54,
            'hasChildren' => 0,
          ),
          61 => 
          array (
            'title' => 'projects / labs',
            'path' => 'features/projects-labs/',
            'type' => '374',
            'pid' => 54,
            'hasChildren' => 0,
          ),
          60 => 
          array (
            'title' => 'web development',
            'path' => 'features/web-development',
            'type' => '374',
            'pid' => 54,
            'hasChildren' => 1,
            'children' => 
            array (
              74 => 
              array (
                'title' => 'articles',
                'path' => 'features/web-development/articles/',
                'type' => '374',
                'pid' => 60,
                'hasChildren' => 0,
              ),
              73 => 
              array (
                'title' => 'overview',
                'path' => 'features/web-development',
                'type' => '118',
                'pid' => 60,
                'hasChildren' => 0,
              ),
              75 => 
              array (
                'title' => 'tutorials',
                'path' => 'features/web-development/tutorials',
                'type' => '374',
                'pid' => 60,
                'hasChildren' => 0,
              ),
            ),
          ),
        ),
      ),
      55 => 
      array (
        'title' => 'Activity',
        'path' => 'activity',
        'type' => '374',
        'pid' => 52,
        'hasChildren' => 0,
      ),
      56 => 
      array (
        'title' => 'Blog',
        'path' => 'blog',
        'type' => '374',
        'pid' => 52,
        'hasChildren' => 0,
      ),
      57 => 
      array (
        'title' => 'About',
        'path' => 'about',
        'type' => '374',
        'pid' => 52,
        'hasChildren' => 1,
        'children' => 
        array (
          76 => 
          array (
            'title' => 'the author',
            'path' => 'about/the-author',
            'type' => '118',
            'pid' => 57,
            'hasChildren' => 0,
          ),
          77 => 
          array (
            'title' => 'the website',
            'path' => 'about/the-website',
            'type' => '118',
            'pid' => 57,
            'hasChildren' => 0,
          ),
        ),
      ),
    ),
  ),
);

print_r($example);

?>

Answer 1

我假设顶部还有另一个数组（未包含在您的示例代码中。
像这样的东西吗？

function array_set_depth($array, $depth = -1)
{
  $subdepth = $depth + 1;
  if ($depth < 0) {
    foreach ($array as $key => $subarray) {
      $temp[$key] = array_set_depth(($subarray), $subdepth);
    }
  }
  if ($array['hasChildren'] && isset($array['children'])) {
    foreach ($array['children'] as $key => $subarray) {
      $temp[$key] = array_set_depth($subarray, $subdepth);
    }
    $array['children'] = $temp;
  }
  $array['depth'] = $depth;
  return $array;
}

示例用法，我将您的数组设置为值 $a：

$b = array_set_depth($a);
print_r($b);

编辑：

要在子项之前设置深度以实现良好的打印，您可以执行以下操作：

function array_set_depth($array, $depth = -1)
{
  $subdepth = $depth + 1;
  if ($depth < 0) {
    foreach ($array as $key => $subarray) {
      $temp[$key] = array_set_depth(($subarray), $subdepth);
    }
    return $temp;
  }
  $array['depth'] = $depth;
  if ($array['hasChildren'] && isset($array['children'])) {
    foreach ($array['children'] as $key => $subarray) {
      $temp[$key] = array_set_depth($subarray, $subdepth);
    }
    unset($array['children']);
    $array['children'] = $temp;
  }
  return $array;
}

Answer 2

像这样的递归函数应该可以做到吗？

function setDepth(&$a, $depth)
{
    $a['depth']=$depth;
    foreach($a as $key=>$value)
    {
        if (is_array($value))
           setDepth($a[$key], $depth+1);
    }

}

需要注意的是，数组是通过引用传递的，这样我们就可以对其进行修改。 请注意，我们还在对 setDepth 的递归调用中使用此引用。 尽管为了方便起见，我使用了 foreach，但 $value 变量是一个副本，将其传递给 setDepth 只会在 foreach 循环范围内进行短暂的更改。

Answer 3

修改了 Pauls 代码以使用此示例。

function setDepth(&$a, $depth = -1)
{
    if (($depth > -1) && !($depth % 2))
      $a['depth']= $depth / 2;
    foreach($a as $key=>$value)
    {
        if (is_array($value))
           setDepth($a[$key], $depth+1);
    }

}
setDepth($a);
print_r($a);

Answer 4

像这样的东西应该可以解决问题：

function setdepth($arr, $depth = 0)
{
    foreach ($arr as $key => $val)
    {
        $arr[$key]['depth'] = $depth;
        if ($arr[$key]['hasChildren'])
        {
            setdepth(&$arr[$key]['children'], $depth+1);
        }
    }
}

如果你的数组以索引而不是值开头，我会更容易，所以示例用法可以是这样的：

$arr[0] = $website;
setdepth(&$arr, 0);

其中 website 是示例中的数组

Answer 5

这可能会有所帮助：

function extend( $arr, $myArr=array() ) {

    foreach( $arr as $key => $value ) {
        if( is_array( $key ) ) {
            extend( $arr[ $key ] );
        } else {
            $myArr[ $key ] = $arr[ $key ];
        }
    }

    return $myArr;
}

名为“extend”的函数，因为它不仅将数组复制到新数组中，还可以扩展现有数组。

要扩展数组，您应该将其作为第二个参数，否则放置一个空数组。
该函数遍历数组属性并检查它是否是一个数组，以及是否再次调用它，否则它将值复制到另一个数组中并返回它。