失敗對工會陣列在PHP

我有一個這樣的數組：失敗對工會陣列在PHP

Array 
(
    [6] => Array 
     (
      [cate_id] => 6 
      [cate_name] => mobile 
      [cate_parent] => 0 
      [cate_order] => 2 
      [children] => Array 
       (
        [17] => Array 
         (
          [cate_id] => 17 
          [cate_name] => old styled phone 
          [cate_parent] => 6 
          [cate_order] => 2 
          [children] => Array 
           (
            [24] => Array 
             (
              [cate_id] => 24 
              [cate_name] => nokia1 
              [cate_parent] => 17 
              [cate_order] => 1 
             ) 

           ) 

         ) 

        [18] => Array 
         (
          [cate_id] => 18 
          [cate_name] => smart phone 
          [cate_parent] => 6 
          [cate_order] => 1 
          [children] => Array 
           (
            [21] => Array 
             (
              [cate_id] => 21 
              [cate_name] => apple 
              [cate_parent] => 18 
              [cate_order] => 1 
             ) 

            [23] => Array 
             (
              [cate_id] => 23 
              [cate_name] => nokia 
              [cate_parent] => 18 
              [cate_order] => 1 
             ) 

           ) 

         ) 

        [20] => Array 
         (
          [cate_id] => 20 
          [cate_name] => tablet 
          [cate_parent] => 6 
          [cate_order] => 3 
         ) 

       ) 

     ) 

    [19] => Array 
     (
      [cate_id] => 19 
      [cate_name] => accessories 
      [cate_parent] => 0 
      [cate_order] => 3 
      [children] => Array 
       (
        [22] => Array 
         (
          [cate_id] => 22 
          [cate_name] => phone case 
          [cate_parent] => 19 
          [cate_order] => 1 
         ) 

       ) 

     ) 

)

我寫這會得到特定類別的兒童IDS的功能。例如，如果我給「6」，它將返回17,24,18,21,23,20。這裏是我的功能：

function get_category_children($categories_tree, $parent) 
    { 
    //$children_list = ''; 
     $children_list = array(); 
     foreach ($categories_tree as $categories_branch) 
     { 
      if ($categories_branch['cate_parent'] == $parent) 
      { 
       $children_list[] = $categories_branch['cate_id']; 
      } 
      else 
      { 
       //echo "{$categories_branch['cate_id']},"; 
      } 

      if(! empty($categories_branch['children'])) 
      { 
       //echo "{$categories_branch['cate_id']},"; 
       $children_list += get_category_children($categories_branch['children'], $categories_branch['cate_id']); 
      } 

     } 

     return $children_list; 
    }

但它只返回17,18,20。起初我還以爲有什麼問題在我的功能的邏輯，但是當我改變$ children_list的類型從數組字符串，像這樣：

function get_category_children($categories_tree, $parent) 
{ 
    $children_list = ''; 
    //$children_list = array(); 
    foreach ($categories_tree as $categories_branch) 
    { 
     if ($categories_branch['cate_parent'] == $parent) 
     { 
      $children_list .= $categories_branch['cate_id'].','; 
     } 
     else 
     { 
      //echo "{$categories_branch['cate_id']},"; 
     } 

     if(! empty($categories_branch['children'])) 
     { 
      //echo "{$categories_branch['cate_id']},"; 
      $children_list .= get_category_children($categories_branch['children'], $categories_branch['cate_id']); 
     } 

    } 

    return $children_list; 
}

它的工作原理神仙好，並返回我需要的一切，所以我覺得可能是$children_list += get_category_children($categories_branch['children'], $categories_branch['cate_id']);有什麼問題，所以新陣列沒有添加到舊陣列，但我不知道爲什麼，以及如何解決它？

來源

2014-05-08 user1985916

你能寫第二個例子的var_dump（$ children_list;）嗎？ –

-1

$children_list += get_category_children($categories_branch['children'], $categories_branch['cate_id']);是你的問題。你不能+=加入數組。偉大的作品遞增整數，但沒有那麼大與陣列;）

相反，合併數組：

$children_list = array_merge($children_list, 
get_category_children($categories_branch['children'], $categories_branch['cate_id']));

完整代碼：

function get_category_children($categories_tree, $parent) 
    { 
    //$children_list = ''; 
     $children_list = array(); 
     foreach ($categories_tree as $categories_branch) 
     { 
      if ($categories_branch['cate_parent'] == $parent) 
      { 
       $children_list[] = $categories_branch['cate_id']; 
      } 
      else 
      { 
       //echo "{$categories_branch['cate_id']},"; 
      } 

      if(! empty($categories_branch['children'])) 
      { 
       //echo "{$categories_branch['cate_id']},"; 
       // $children_list += get_category_children($categories_branch['children'], $categories_branch['cate_id']); 

       $children_list = array_merge($children_list, 
       get_category_children($categories_branch['children'], $categories_branch['cate_id'])); 

      } 

     } 

     return $children_list; 
    }

來源

2014-05-08 16:28:06

請解釋downvote ...？ –

謝謝，它工作完美！我不知道是誰投下你的答案，但不是我。我很抱歉，因爲我的小點，我不能投票。 – user1985916

-1

不能合併陣列，+運營商。你需要array_merge。

來源

2014-05-08 16:29:27 lafor

謝謝，它完美的工作！我不知道是誰投票否決了你的答案，但不是我。我很抱歉，因爲我的小點，我不能投票。 – user1985916

function getChildren($in_arr) { 
    $out_arr = array(); 
    foreach($in_arr['children'] as $key => $child) { 
    $out_arr[] = $key; 
    if(isset($child['children']) { 
     $out_arr = array_merge($out_arr, get_children($child)); 
    } 
    return $out_arr; 
    } 
}

來源

2014-05-08 16:37:55 Sammitch

您能否詳細說明如何解決問題而不僅僅是提供答案？ –

失敗對工會陣列在PHP

回答

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