越来越阵列关键的笨

Question

值我在我的控制器下面一行：

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

此数据印刷使用的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 
      ) 

    ) 

) 

我想使用存储在值以下[catid]键，我试图做这样的事情： $ data ['faq'] ['catid']在控制器中获取该值（我想再次使用该值进行选择）但是我得到与此错误消息：未定义的索引：catid

任何人都可以帮助我获得['catid']的价值？

问候，卓然

Answer 1

其3维阵列倒带密切存在faq阵列的两个元素。你必须写的东西是这样的：$data['faq'][0]['catid']或$data['faq'][1]['catid']

Answer 2

您正在访问的阵列的方式是不正确，你缺少的第二个层次的项目指标。用它作为你正在做正确的方法是做

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

然而，这仅会一次一个faqid，它不是那么有用，当你迭代。所以，一个好方法就是这样。

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