多種選擇PHP

Question

我用PHP（Codeigniter）和MySQL做了多項選擇。我在嘗試從每個問題的答案（使用動態名稱）檢索值時遇到了麻煩。下面是單選按鈕的代碼：

<input type="radio" name="question_id (according to id of question)" value="answer_id"> 

所以，如果我有3個隨機出題，該結構將

<p>Question number 1 goes here</p> 
<input type="radio" name="question_id1[]" value="1"> 
<input type="radio" name="question_id1[]" value="2"> 
<input type="radio" name="question_id1[]" value="3"> 
<input type="radio" name="question_id1[]" value="4"> 
<input type="radio" name="question_id1[]" value="5"> 


<p>Question number 6 goes here</p> 
<input type="radio" name="question_id6[]" value="1"> 
<input type="radio" name="question_id6[]" value="2"> 
<input type="radio" name="question_id6[]" value="3"> 
<input type="radio" name="question_id6[]" value="4"> 
<input type="radio" name="question_id6[]" value="5"> 


<p>Question number 9 goes here</p> 
<input type="radio" name="question_id9[]" value="1"> 
<input type="radio" name="question_id9[]" value="2"> 
<input type="radio" name="question_id9[]" value="3"> 
<input type="radio" name="question_id9[]" value="4"> 
<input type="radio" name="question_id9[]" value="5"> 

如何檢索，涉及到這個問題的答案？例如把它放在像陣列：

array p = ['id_question' => 21, 'id_answer'=4] 

The radio button structure

Answer 1

與

<p>Question number 9 goes here</p> 
<input type="radio" name="question_id[9]" value="1"> 
<input type="radio" name="question_id[9]" value="2"> 
<input type="radio" name="question_id[9]" value="3"> 
<input type="radio" name="question_id[9]" value="4"> 
<input type="radio" name="question_id[9]" value="5"> 
<p>Question number 6 goes here</p> 
<input type="radio" name="question_id[6]" value="1"> 
<input type="radio" name="question_id[6]" value="2"> 
<input type="radio" name="question_id[6]" value="3"> 
<input type="radio" name="question_id[6]" value="4"> 
<input type="radio" name="question_id[6]" value="5"> 

而在服務器側

<?php 
//assuming form method is post 
$questions_array = array(); 
foreach($_POST[question_id] as $key=>$answer) 
{ 
    $questions_array[] = array('id_question' => $key, 'id_answer'= $answer); 
} 
print_r($questions_array); 
?> 

假設用戶嘗試可以選擇單個無線電按鈕單個問題....

Answer 2

我已經把表單中的代碼和我提交它的提交按鈕。然後輸出我得到它是 陣列 （ [question_id1] =>數組 （ [0] => 3 ）

[question_id6] => Array 
    (
     [0] => 2 
    ) 

[question_id9] => Array 
    (
     [0] => 3 
    ) 

[submit] => submit 

） 因此，我們可以用相同的名稱訪問。我用普通的PHP代碼做了。因爲形成的數組在覈心php和codeigniter中都是相同的。所以我們可以通過for循環訪問它。