将具有3列的二维数组转换为没有关联键的分层结构。

huangapple
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英文:

Convert 2d array with 3 columns into a hierarchical structure with no associative keys

问题

以下是您提供的内容的翻译：

我有这样的数据：

将具有3列的二维数组转换为没有关联键的分层结构。

这也可以看作是这个PHP数组：

  1. $items = [
  2.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'h'],
  3.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'i'],
  4.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'j'],
  5.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'k'],
  6.     ['item1' => 'b', 'item2' => 'e', 'item3' => 'l'],
  7.     ['item1' => 'b', 'item2' => 'e', 'item3' => 'm'],
  8.     ['item1' => 'b', 'item2' => 'f', 'item3' => 'n'],
  9.     ['item1' => 'b', 'item2' => 'g', 'item3' => 'o'],
  10. ];

或者是这个（多维）列表：

  1. a
  2.     c
  3.         h
  4.         i
  5.     d
  6.         j
  7.         k
  8. b
  9.     e
  10.         l
  11.         m
  12.     f
  13.         n
  14.     g
  15.         o

我应该如何循环遍历这些数据并创建一个多维数组，如下所示：

  1. $items = [
  2.     [a, [[c, [h, i]], [d, [j, k]]],  
  3.     [b, [[e, [l, m]], [f, [n]], [g, [o]]]
  4. ];

基本上，我的目标是构建多维HTML列表，但我被困住了。
有了多维数组，我就能做到了。

谢谢！

这是尝试解决它的一种方法。
这是一个稍微复杂的例子。
它有一些索引错误。

我想知道是否有更清晰的方法。

  1. <?php
  3. $items = [
  4.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd2', 'item4' => 'f'],
  5.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd2', 'item4' => 'g'],
  6.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'd3', 'item4' => 'h'],
  7.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'e', 'item4' => 'i'],
  8.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'j'],
  9.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'k'],
  10.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'l'],
  11.     ['item1' => 'b', 'item2' => 'c2', 'item3' => 'e', 'item4' => 'm'],
  12. ];
  15. $items_new = [];
  17. $item1 = '';
  18. $item2 = '';
  19. $item3 = '';
  20. $item4 = '';
  22. foreach ($items as $item):
  24.   $item1_new = $item['item1'];
  25.   $item2_new = $item['item2'];
  26.   $item3_new = $item['item3'];
  27.   $item4_new = $item['item4'];
  29.   if($item1 != $item1_new)
  30.   {
  31.     $items_new[] = [$item1_new, []];
  33.     $item1 = $item1_new;
  35.     $item2 = '';
  36.   }
  37.   
  38.   if($item2 != $item2_new)
  39.   {
  40.     $items_new[count($items_new) - 1][] = [$item2_new, []];
  42.     $item2 = $item2_new;
  44.     $item3 = '';
  45.   }
  47.   if($item3 != $item3_new)
  48.   {
  49.     $items_new[count($items_new) - 1][count($items_new[1]) - 1][] = [$item3_new, []];
  51.     $item3 = $item3_new;
  53.     $item4 = '';
  54.   }
  56.   if($item4 != $item4_new)
  57.   {
  58.     $items_new[count($items_new) - 1][count($items_new[1]) - 1][count($items_new[2]) - 1][] = [$item4_new, []];
  60.     $item4 = $item4_new;
  61.   }
  64. endforeach;
  66. foreach($items_new as $items1)
  67. {
  68.   if (is_string($items1))
  69.   {
  70.     echo $items1 . '<br>';
  71.   }
  72.   elseif (is_array($items1))
  73.   {
  74.     foreach($items1 as $items2)
  75.     {
  76.         if (is_string($items2))
  77.         {
  78.           echo  ' - ' . $items2 . '<br>';
  79.         }
  80.         elseif (is_array($items2))
  81.         {
  82.           foreach ($items2 as $items3)
  83.           {
  84.             if (is_string($items3))
  85.             {
  86.               echo  ' --- ' . $items3 . '<br>';
  87.             }
  88.             elseif (is_array($items3))
  89.             {
  90.               foreach ($items3 as $items4)
  91.               {
  92.                 if (is_string($items4))
  93.                 {
  94.                   echo  ' ----- ' . $items4 . '<br>';
  95.                 }
  96.                 elseif (is_array($items4))
  97.                 {
  98.                   foreach ($items4 as $items5)
  99.                   {
  100.                     if (is_string($items5))
  101.                     {
  102.                       echo  ' ------- ' . $items5 . '<br>';
  103.                     }
  104.                     elseif (is_array($items5))
  105.                     {
  106.                       foreach ($items5 as $items6)
  107.                       {
  108.                         
  109.                       }
  110.                     }
  111.                   }
  112.                 }
  113.               }
  114.             }
  115.           }
  116.         }
  117.     }
  118.   }
  119. }
  120. ?>
英文:

I have data like this:

将具有3列的二维数组转换为没有关联键的分层结构。

Which can also be seen as this PHP array:

  1. $items = [
  2.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;h&#39;],
  3.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;i&#39;],
  4.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;j&#39;],
  5.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;k&#39;],
  6.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;e&#39;, &#39;item3&#39; =&gt; &#39;l&#39;],
  7.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;e&#39;, &#39;item3&#39; =&gt; &#39;m&#39;],
  8.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;f&#39;, &#39;item3&#39; =&gt; &#39;n&#39;],
  9.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;g&#39;, &#39;item3&#39; =&gt; &#39;o&#39;],
  10. ];

Or even this (multidimensional) list:

  1. a
  2.     c
  3.         h
  4.         i
  5.     d
  6.         j
  7.         k
  8. b
  9.     e
  10.         l
  11.         m
  12.     f
  13.         n
  14.     g
  15.         o

How could I loop through this data and create a multidimensional array like

  1. $items = [
  2.     [a, [[c, [h, i]], [d, [j, k]]],  
  3.     [b, [[e, [l, m]], [f, [n]], [g, [o]]]
  4. ];

Basically my aim to build the multidimensional html list, but my brain is stuck.
With the multidimensional array I'd be able to do it.

Thanks!

Here's an attempt to solve it.
It's a bit more complicated example.
And it's "too hard coded".
There are some errors in the indexes.

I'm wondering if there's a cleaner approach.

  1. &lt;?php
  3. $items = [
  4.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d2&#39;, &#39;item4&#39; =&gt; &#39;f&#39;],
  5.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d2&#39;, &#39;item4&#39; =&gt; &#39;g&#39;],
  6.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;d3&#39;, &#39;item4&#39; =&gt; &#39;h&#39;],
  7.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;i&#39;],
  8.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;j&#39;],
  9.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;k&#39;],
  10.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;l&#39;],
  11.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c2&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;m&#39;],
  12. ];
  15.         $items_new = [];
  17.         $item1 = &#39;&#39;;
  18.         $item2 = &#39;&#39;;
  19.         $item3 = &#39;&#39;;
  20.         $item4 = &#39;&#39;;
  22.         foreach ($items as $item):
  24.           $item1_new = $item[&#39;item1&#39;];
  25.           $item2_new = $item[&#39;item2&#39;];
  26.           $item3_new = $item[&#39;item3&#39;];
  27.           $item4_new = $item[&#39;item4&#39;];
  29.           if($item1 != $item1_new)
  30.           {
  31.             $items_new[] = [$item1_new, []];
  33.             $item1 = $item1_new;
  35.             $item2 = &#39;&#39;;
  36.           }
  37.           
  38.           if($item2 != $item2_new)
  39.           {
  40.             $items_new[count($items_new) - 1][] = [$item2_new, []];
  42.             $item2 = $item2_new;
  44.             $item3 = &#39;&#39;;
  45.           }
  47.           if($item3 != $item3_new)
  48.           {
  49.             $items_new[count($items_new) - 1][count($items_new[1]) - 1][] = [$item3_new, []];
  51.             $item3 = $item3_new;
  53.             $item4 = &#39;&#39;;
  54.           }
  56.           if($item4 != $item4_new)
  57.           {
  58.             $items_new[count($items_new) - 1][count($items_new[1]) - 1][count($items_new[2]) - 1][] = [$item4_new, []];
  60.             $item4 = $item4_new;
  61.           }
  64.         endforeach;
  65.  
  68.         foreach($items_new as $items1)
  69.         {
  70.           if (is_string($items1))
  71.           {
  72.             echo $items1 . &#39;&lt;br&gt;&#39;;
  73.           }
  74.           elseif (is_array($items1))
  75.           {
  76.             foreach($items1 as $items2)
  77.             {
  78.                 if (is_string($items2))
  79.                 {
  80.                   echo  &#39; - &#39; . $items2 . &#39;&lt;br&gt;&#39;;
  81.                 }
  82.                 elseif (is_array($items2))
  83.                 {
  84.                   foreach ($items2 as $items3)
  85.                   {
  86.                     if (is_string($items3))
  87.                     {
  88.                       echo  &#39; --- &#39; . $items3 . &#39;&lt;br&gt;&#39;;
  89.                     }
  90.                     elseif (is_array($items3))
  91.                     {
  92.                       foreach ($items3 as $items4)
  93.                       {
  94.                         if (is_string($items4))
  95.                         {
  96.                           echo  &#39; ----- &#39; . $items4 . &#39;&lt;br&gt;&#39;;
  97.                         }
  98.                         elseif (is_array($items4))
  99.                         {
  100.                           foreach ($items4 as $items5)
  101.                           {
  102.                             if (is_string($items5))
  103.                             {
  104.                               echo  &#39; ------- &#39; . $items5 . &#39;&lt;br&gt;&#39;;
  105.                             }
  106.                             elseif (is_array($items5))
  107.                             {
  108.                               foreach ($items5 as $items6)
  109.                               {
  110.                                 
  111.                               }
  112.                             }
  113.                           }
  114.                         }
  115.                       }
  116.                     }
  117.                   }
  118.                 }
  119.             }
  120.           }
  121.         }
  122.         ?&gt;

答案1

得分: 1

使用引用来避免跟踪显式索引，当您推送和管理数据分组时。

一个引用将确定是否需要实例化新的顶级行并将其推送到结果数组中。另一个引用将确定是否需要实例化唯一的第二级行并将其推送到其父级。

代码: (演示)

  1. $result = [];
  2. foreach ($items as $row) {
  3.     $k1 = $row['item1'];
  4.     $k2 = $row['item1'] . '_' . $row['item2'];
  5.     if (!isset($ref2[$k2])) {
  6.         $ref2[$k2] = [$row['item2'], [$row['item3']]];
  7.         if (!isset($ref1[$k1])) {
  8.             $ref1[$k1] = [$row['item1'], &$ref2[$k2]];
  9.             $result[] = &$ref1[$k1];
  10.         } else {
  11.             $ref1[$k1][] = &$ref2[$k2];
  12.         }
  13.     } else {
  14.         $ref2[$k2][1][] = $row['item3'];
  15.     }
  16. }
  17. echo json_encode($result);

输出（带有一些换行和缩进以提高可读性）:

  1. [
  2.     ["a", ["c", ["h", "i"]], ["d", ["j", "k"]]],
  3.     ["b", ["e", ["l", "m"]], ["f", ["n"]], ["g", ["o"]]]
  4. ]

以上片段可以通过在一组相似的条件内再次包装该过程来扩展以容纳每行4个元素。请注意（与第一个片段一样），只有最低级别的元素没有声明为引用。演示

  1. $items = [
  2.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd2', 'item4' => 'f'],
  3.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd2', 'item4' => 'g'],
  4.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'd3', 'item4' => 'h'],
  5.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'e', 'item4' => 'i'],
  6.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'j'],
  7.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'k']
  8. ];
  10. $result = [];
  11. foreach ($items as $row) {
  12.     $k1 = $row['item1'];
  13.     $k2 = $row['item1'] . '_' . $row['item2'];
  14.     $k3 = $row['item1'] . '_' . $row['item2'] . '_' . $row['item3'];
  15.     if (!isset($ref3[$k3])) {
  16.         $ref3[$k3] = [$row['item3'], [$row['item4']]];
  17.         if (!isset($ref2[$k2])) {
  18.             $ref2[$k2] = [$row['item2'], &$ref3[$k3]];
  19.             if (!isset($ref1[$k1])) {
  20.                 $ref1[$k1] = [$row['item1'], &$ref2[$k2]];
  21.                 $result[] = &$ref1[$k1];
  22.             } else {
  23.                 $ref1[$k1][] = &$ref2[$k2];
  24.             }
  25.         } else {
  26.             $ref2[$k2][1][] = &$ref3[$k3];
  27.         }
  28.     } else {
  29.         $ref3[$k3][1][] = $row['item4'];
  30.     }
  31. }
  32. echo json_encode($result);

输出:

  1. [
  2.     ["a", ["c", ["d2", ["f", "g"]]], ["d", ["d3", ["h"], ["e", ["i"]]]]],
  3.     ["b", ["c", ["e", ["j", "k"]]]]
  4. ]
英文:

Use references to avoid keeping track of explicit indexes as you push and manage data grouping.

One reference will determine if a new top level row needs to be instantiated and pushed into the result array. Another reference will determine if a unique second level row needs to be instantiated and pushed into its parent.

Code: (Demo)

  1. $result = [];
  2. foreach ($items as $row) {
  3.     $k1 = $row[&#39;item1&#39;];
  4.     $k2 = $row[&#39;item1&#39;] . &#39;_&#39; . $row[&#39;item2&#39;];
  5.     if (!isset($ref2[$k2])) {
  6.         $ref2[$k2] = [$row[&#39;item2&#39;], [$row[&#39;item3&#39;]]];
  7.         if (!isset($ref1[$k1])) {
  8.             $ref1[$k1] = [$row[&#39;item1&#39;], &amp;$ref2[$k2]];
  9.             $result[] = &amp;$ref1[$k1];
  10.         } else {
  11.             $ref1[$k1][] = &amp;$ref2[$k2];
  12.         }
  13.     } else {
  14.         $ref2[$k2][1][] = $row[&#39;item3&#39;];
  15.     }
  16. }
  17. echo json_encode($result);

Output (with some newlines and tabbing to improve readability):

  1. [
  2.     [&quot;a&quot;,[&quot;c&quot;,[&quot;h&quot;,&quot;i&quot;]],[&quot;d&quot;,[&quot;j&quot;,&quot;k&quot;]]],
  3.     [&quot;b&quot;,[&quot;e&quot;,[&quot;l&quot;,&quot;m&quot;]],[&quot;f&quot;,[&quot;n&quot;]],[&quot;g&quot;,[&quot;o&quot;]]]
  4. ]

The above snippet can be extended to accommodate 4 elements per row by wrapping the process inside another set of similar conditions. Notice that (like the first snippet) only the lowest level element us not declared as a reference. Demo

  1. $items = [
  2.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d2&#39;, &#39;item4&#39; =&gt; &#39;f&#39;],
  3.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d2&#39;, &#39;item4&#39; =&gt; &#39;g&#39;],
  4.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;d3&#39;, &#39;item4&#39; =&gt; &#39;h&#39;],
  5.     [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;i&#39;],
  6.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;j&#39;],
  7.     [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;k&#39;]
  8. ];
  10. $result = [];
  11. foreach ($items as $row) {
  12.     $k1 = $row[&#39;item1&#39;];
  13.     $k2 = $row[&#39;item1&#39;] . &#39;_&#39; . $row[&#39;item2&#39;];
  14.     $k3 = $row[&#39;item1&#39;] . &#39;_&#39; . $row[&#39;item2&#39;] . &#39;_&#39; . $row[&#39;item3&#39;];
  15.     if (!isset($ref3[$k3])) {
  16.         $ref3[$k3] = [$row[&#39;item3&#39;], [$row[&#39;item4&#39;]]];
  17.         if (!isset($ref2[$k2])) {
  18.             $ref2[$k2] = [$row[&#39;item2&#39;], &amp;$ref3[$k3]];
  19.             if (!isset($ref1[$k1])) {
  20.                 $ref1[$k1] = [$row[&#39;item1&#39;], &amp;$ref2[$k2]];
  21.                 $result[] = &amp;$ref1[$k1];
  22.             } else {
  23.                 $ref1[$k1][] = &amp;$ref2[$k2];
  24.             }
  25.         } else {
  26.             $ref2[$k2][1][] = &amp;$ref3[$k3];
  27.         }
  28.     } else {
  29.         $ref3[$k3][1][] = $row[&#39;item4&#39;];
  30.     }
  31. }
  32. echo json_encode($result);

Output:

  1. [
  2.     [&quot;a&quot;,[&quot;c&quot;,[&quot;d2&quot;,[&quot;f&quot;,&quot;g&quot;]]],[&quot;d&quot;,[&quot;d3&quot;,[&quot;h&quot;],[&quot;e&quot;,[&quot;i&quot;]]]]],
  3.     [&quot;b&quot;,[&quot;c&quot;,[&quot;e&quot;,[&quot;j&quot;,&quot;k&quot;]]]]
  4. ]

答案2

得分: 0

已解决！

  1. $items = [
  2.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd2', 'item4' => 'f'],
  3.     ['item1' => 'a', 'item2' => 'c', 'item3' => 'd1', 'item4' => 'g'],
  4.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'd3', 'item4' => 'h'],
  5.     ['item1' => 'a', 'item2' => 'd', 'item3' => 'e', 'item4' => 'i'],
  6.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'j'],
  7.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e', 'item4' => 'k'],
  8.     ['item1' => 'b', 'item2' => 'c', 'item3' => 'e1', 'item4' => 'l'],
  9.     ['item1' => 'b', 'item2' => 'c2', 'item3' => 'e', 'item4' => 'm'],
  10.     ['item1' => 'x', 'item2' => 'c2', 'item3' => 'e', 'item4' => 'm'],
  11.     ['item1' => 'x', 'item2' => 'c2', 'item3' => 'e2', 'item4' => 'n'],
  12. ];
  14. $items_new = [];
  16. $item1 = '';
  17. $count1 = 0;
  19. foreach ($items as $item):
  21.     $item1_new = $item['item1'];
  22.     $item2_new = $item['item2'];
  23.     $item3_new = $item['item3'];
  24.     $item4_new = $item['item4'];
  26.     if ($item1 != $item1_new) {
  27.         $items_new[] = [$item1_new, []];
  29.         $item1 = $item1_new;
  30.         $count1++;
  32.         $item2 = '';
  33.         $count2 = 0;
  34.     }
  36.     if ($item2 != $item2_new) {
  37.         $items_new[$count1 - 1][$count2 + 1] = [$item2_new, []];
  39.         $item2 = $item2_new;
  40.         $count2++;
  42.         $item3 = '';
  43.         $count3 = 0;
  44.     }
  46.     if ($item3 != $item3_new) {
  47.         $items_new[$count1 - 1][$count2 + 1 - 1][$count3 + 1] = [$item3_new, []];
  49.         $item3 = $item3_new;
  50.         $count3++;
  52.         $item4 = '';
  53.         $count4 = 0;
  54.     }
  56.     if ($item4 != $item4_new) {
  57.         $items_new[$count1 - 1][$count2 + 1 - 1][$count3 + 1 - 1][$count4 + 1] = [$item4_new];
  59.         $item4 = $item4_new;
  60.         $count4++;
  61.     }
  63. endforeach;
  65. foreach ($items_new as $items1) {
  66.     if (is_string($items1)) {
  67.         echo $items1 . '<br>';
  68.     } else {
  69.         foreach ($items1 as $items2) {
  70.             if (is_string($items2)) {
  71.                 echo ' - ' . $items2 . '<br>';
  72.             } else {
  73.                 foreach ($items2 as $items3) {
  74.                     if (is_string($items3)) {
  75.                         echo ' --- ' . $items3 . '<br>';
  76.                     } else {
  77.                         foreach ($items3 as $items4) {
  78.                             if (is_string($items4)) {
  79.                                 echo ' ----- ' . $items4 . '<br>';
  80.                             } else {
  81.                                 foreach ($items4 as $items5) {
  82.                                     if (is_string($items5)) {
  83.                                         echo ' ------- ' . $items5 . '<br>';
  84.                                     }
  85.                                 }
  86.                             }
  87.                         }
  88.                     }
  89.                 }
  90.             }
  91.         }
  92.     }
  93. }

以上是您提供的 PHP 代码的翻译部分。

英文:

Solved!

  1. $items = [
  2. [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d2&#39;, &#39;item4&#39; =&gt; &#39;f&#39;],
  3. [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;d1&#39;, &#39;item4&#39; =&gt; &#39;g&#39;],
  4. [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;d3&#39;, &#39;item4&#39; =&gt; &#39;h&#39;],
  5. [&#39;item1&#39; =&gt; &#39;a&#39;, &#39;item2&#39; =&gt; &#39;d&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;i&#39;],
  6. [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;j&#39;],
  7. [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;k&#39;],
  8. [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c&#39;, &#39;item3&#39; =&gt; &#39;e1&#39;, &#39;item4&#39; =&gt; &#39;l&#39;],
  9. [&#39;item1&#39; =&gt; &#39;b&#39;, &#39;item2&#39; =&gt; &#39;c2&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;m&#39;],
  10. [&#39;item1&#39; =&gt; &#39;x&#39;, &#39;item2&#39; =&gt; &#39;c2&#39;, &#39;item3&#39; =&gt; &#39;e&#39;, &#39;item4&#39; =&gt; &#39;m&#39;],
  11. [&#39;item1&#39; =&gt; &#39;x&#39;, &#39;item2&#39; =&gt; &#39;c2&#39;, &#39;item3&#39; =&gt; &#39;e2&#39;, &#39;item4&#39; =&gt; &#39;n&#39;],
  12. ];
  13. $items_new = [];
  14. $item1 = &#39;&#39;;
  15. $count1 = 0;
  16. foreach ($items as $item):
  17. $item1_new = $item[&#39;item1&#39;];
  18. $item2_new = $item[&#39;item2&#39;];
  19. $item3_new = $item[&#39;item3&#39;];
  20. $item4_new = $item[&#39;item4&#39;];
  21. if($item1 != $item1_new)
  22. {
  23. $items_new[] = [$item1_new, []];
  24. $item1 = $item1_new;
  25. $count1++;
  26. $item2 = &#39;&#39;;
  27. $count2 = 0;
  28. }
  29. if($item2 != $item2_new)
  30. {
  31. $items_new[$count1 - 1][$count2+1] = [$item2_new, []] ;
  32. $item2 = $item2_new;
  33. $count2++;
  34. $item3 = &#39;&#39;;
  35. $count3 = 0;
  36. }
  37. if($item3 != $item3_new)
  38. {
  39. $items_new[$count1 - 1][$count2+1-1][$count3+1] = [$item3_new, []] ;
  40. $item3 = $item3_new;
  41. $count3++;
  42. $item4 = &#39;&#39;;
  43. $count4 = 0;
  44. }
  45. if($item4 != $item4_new)
  46. {
  47. $items_new[$count1 - 1][$count2+1-1][$count3+1-1][$count4+1]  = [$item4_new] ;
  48. $item4 = $item4_new;
  49. $count4++;
  50. }
  51. endforeach;
  52. foreach($items_new as $items1)
  53. {
  54. if (is_string($items1))
  55. {
  56. echo $items1 . &#39;&lt;br&gt;&#39;;
  57. }
  58. else
  59. {
  60. foreach($items1 as $items2)
  61. {
  62. if (is_string($items2))
  63. {
  64. echo  &#39; - &#39; . $items2 . &#39;&lt;br&gt;&#39;;
  65. }
  66. else
  67. {
  68. foreach ($items2 as $items3)
  69. {
  70. if (is_string($items3))
  71. {
  72. echo  &#39; --- &#39; . $items3 . &#39;&lt;br&gt;&#39;;
  73. }
  74. else
  75. {
  76. foreach ($items3 as $items4)
  77. {
  78. if (is_string($items4))
  79. {
  80. echo  &#39; ----- &#39; . $items4 . &#39;&lt;br&gt;&#39;;
  81. }
  82. else
  83. {
  84. foreach ($items4 as $items5)
  85. {
  86. if (is_string($items5))
  87. {
  88. echo  &#39; ------- &#39; . $items5 . &#39;&lt;br&gt;&#39;;
  89. }
  90. }
  91. }
  92. }
  93. }
  94. }
  95. }
  96. }
  97. }
  98. }

huangapple
  • 本文由 发表于 2023年5月29日 04:43:55
  • 转载请务必保留本文链接：https://go.coder-hub.com/76353527.html
  • arrays
  • hierarchical-clustering
  • loops
  • multidimensional-array
  • php
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