数组shuffle与测验php的关键

Question

<?php
$qq=mysql_query("select * from quiz");
$row=mysql_fetch_array($qq);
//var_dump($row);
    $question = $row['question'];
    $_SESSION['quiz_id']=$row['id'];
    $ans_array = array($row['answer1'],$row['answer2'],$row['answer3'],$row['answer4']);
    shuffle($ans_array);
?>
<form name="qform" id="qform">
 <h2> <?php echo $question; ?></h2>   
 <label><input type="radio" value="<?php echo $ans_array[0]; ?>" name="answer"> <?php echo $ans_array[0]; ?></label>
 <label><input type="radio" value="<?php echo $ans_array[1]; ?>" name="answer"> <?php echo $ans_array[1]; ?></label>
 <label><input type="radio" value="<?php echo $ans_array[2]; ?>" name="answer"> <?php echo $ans_array[2]; ?></label>
 <label><input type="radio" value="<?php echo $ans_array[3]; ?>" name="answer"> <?php echo $ans_array[3]; ?></label>
    <p id="submit-row-btn"><input type="submit" id="quiz_submit" class="q_submit" value="Submit">
    <input type="submit" id="quiz_ans_submit" value="Check Answer" class="q_submit" style="display:none">
    <span id="ans_err"></span></p>
 </form>

In my MySQL table, I have stored;

id   question   answer1     answer2     answer3     answer4     ans_key     date
1     1+1=        2           3           1           6           1     2014-08-03 

here is ans_key;

1 =answer1
2 =answer2
3 =answer3
4 =answer4

I am using Ajax to send user's answer.

I want to check the answer key with the relevant value, after array shuffle, how to get the key value to check if the answer is right or not?

Answer 1

i found the answer

<?php
$ans_array = array(1=>$row['answer1'],$row['answer2'],$row['answer3'],$row['answer4']);
$shuffleKeys = array_keys($ans_array);
shuffle($shuffleKeys);
$newArray = array();
    foreach($shuffleKeys as $key) 
    {
        $newArray[$key] = $ans_array[$key];
    ?>
        <label><input type="radio" value="<?php echo $newArray[$key] ?>" data-key="<?php echo $key;?>" name="answer"> <?php echo $newArray[$key]; ?></label>
    <?php
    }
    ?>

here data-key holds the key value of array