从 codeigniter 中的返回数组中获取单独的结果

Question

I would like to tell you that I am stuck in the simple logic.I know it is so simple but I need a help this time.

I have an array <strong>$allCategories</strong> that returns data from db table. ( select * from tablename) 
Structure is like this:

============================================= =====================
ID 类别名称说明父类别
================================================ ================
1 ABCD 2
2 JKL 网络服务器 0
3. WXYZ 绝杀本身 1

I want to show Category name instead of digits.Actually The digits are the Id of the Cateogry name. 
Like JKL comes instead of 2 and ABCD instead of 1.
<?php $i =1;
    foreach($allCategories as $ab){
 ?>
  <tr class="pointer">
  <td class=" "><?php echo $i ?></td>
   <td class=" "><?php echo $ab['category_name'] ?></td>
   <td class=" "><?php echo $ab['category_description']; ?></td>
   <td class=" ">
    <?php
        $parent_category = $ab['parent_category'];
        return $this->db->select('category_name')
        ->from('categories')
         ->where('id', $parent_category)
        ->get()
        ->row();
        //echo $ab['parent_category'] 
    ?>
    </td>
    </tr>
    <?php
       $i++;
       }                            
    ?>

如果您想了解有关我的问题的任何信息或疑问。问我提前致谢:)

Answer 1

这里不要使用"return"。像这样更改它：

echo $this->db->select('category_name')
    ->from('categories')
     ->where('id', $parent_category)
    ->get()
    ->row()["category_name"];

从 codeigniter 中的返回数组中获取单独的结果

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