在插入中获取两个数组？

I have to build a quiz and I am struggling to get two arrays into my insert, I have tried to combine my arrays but that still doesn't work.

I have a hidden field that sends through the question_id, which is an array cause. I have to send trough all the question id's.

<input type="hidden" name="question_id[]" value="<?=$row_ass['uid']?>" />

Then I have check boxes that have to be unique cause, there are alot of questions on one page.

$countquestion++;
?>
<ol>
<li type="a">
<input type="radio" name="answer[<?=$countquestion?>]" value="answer1" /> <?=$row_ass['answer1']?>
</li>

My problem is in getting the values of both values of the array into the INSERT, at the moment everything INSERTS correctly except for the question_id it only adds the last question_id and makes the other one 0.

Submit page:

$sql_data = array();
$sql_prefix = "INSERT INTO student_score(course_uid, student_uid, question_uid, answer) VALUES";
foreach($_POST['answer'] as $id => $answer){
    $course_id = (int) $_POST['course_id'];
    $student_id  = (int) $_POST['student_id'];
    $question_id   = (int) $_POST['question_id'][$id];
    $answer      = mysql_real_escape_string($answer);
    $sql_data[] = "($course_id, $student_id, $question_id, '$answer')";
}
$sql = $sql_prefix.implode(", 
", $sql_data);

if(!mysql_db_query($dbName, $sql, $connect)){
    $_SESSION['msg'] = "Could not save information, Please try again";
    header("Location:student_assignment.php");
}
else{
    $_SESSION['msg'] = "Question successfully created";
    header("Location:student_assignment.php");
}

If someone can please help me, I would appreciate it.

Your question_id doesn't have any indexes.

Look at your answer. You put name="answer[<?=$countquestion?>]". The answers have the index of the question number. Sicne you're trying to get the question to the answer, you need to add the index to the question fields:

name="question_id[<?=$countquestion?>]"

or perhaps

name="question_id[<?=$row_ass['uid']?>]"

Not really sure which one you should use, but you should know.

ALSO, try not to use the short tags <?= ?>. It may look cleaner, but it's very bad practice and causes a lot of headaches (escpecially since they will be gone in future PHP versions)

EDIT: It's also helpful when debugging troubling code to add things like print_r($_POST) to see exactly what's being sent when the form is submitted. =)