navigator recursive make heirarchy array

Question

我想要父母与阵列中的孩子！ 递归部分是一个空数组！ PHP：

function buildNavigation($items, $parent = NULL) {
    $arr = [];
    foreach ($items as $item) {
        if ($item->parent == $parent) {
            $hasChildren = true;
            $arr[] = $item->title;
            $arr[] = $item->link;

            $arr[] = $this->buildNavigation($items, $item->id);
        }
    }
    return $arr;
}

结果：

array (size=15)
0 => string 'صفحه اصلی' (length=17)
1 => string 'index' (length=5)
2 => 
array (size=0)
  empty
3 => string 'محصولات' (length=14)
4 => string 'products' (length=8)
5 => 
array (size=69)
  0 => string 'ابزار' (length=10)
  1 => string 'cornic' (length=6)
  2 => 
    array (size=0)
      empty

12 => string 'تمام صفحات' (length=19)
13 => string '' (length=0)
14 => 
array (size=0)
  empty

  

数组（大小= 0）         空

如何从全部删除这个空数组？
感谢帮助！ 应该如何删除？

Answer 1

如果它是空的，请不要将它添加到数组中。

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