越來越陣列關鍵的笨

Question

值我在我的控制器下面一行：

$data['faq'] = $this->faqModel->get(); 

此數據印刷使用的print_r

Array 
(
[faq] => Array 
    (
     [0] => Array 
      (
       [faqid] => 12 
       [catid] => 122 
       [question] => How this CMS works 
       [question_en] => How this CMS works 
       [answer] => How this CMS works? 
       [answer_en] => How this CMS works? 

       [sorder] => 2 
       [visible] => 1 
      ) 

     [1] => Array 
      (
       [faqid] => 8 
       [catid] => 121 
       [question] => How does the design cost? 
       [question_en] => How does the design cost? 
       [answer] => How does the design cost? 

       [answer_en] => How does the design cost? 

       [sorder] => 1 
       [visible] => 1 
      ) 

    ) 

) 

我想使用存儲在值以下[catid]鍵，我試圖做這樣的事情： $ data ['faq'] ['catid']在控制器中獲取該值（我想再次使用該值進行選擇）但是我得到與此錯誤消息：未定義的索引：catid

任何人都可以幫助我獲得['catid']的價值？

問候，卓然

Answer 1

其3維陣列倒帶密切存在faq陣列的兩個元素。你必須寫的東西是這樣的：$data['faq'][0]['catid']或$data['faq'][1]['catid']

Answer 2

您正在訪問的陣列的方式是不正確，你缺少的第二個層次的項目指標。用它作爲你正在做正確的方法是做

echo $data['faq'][0]['faqid']; //faqid of the first item 

然而，這僅會一次一個faqid，它不是那麼有用，當你迭代。所以，一個好方法就是這樣。

foreach($data['faq'] as $value) { 
echo $value['faqid']; 
}