multiple answers - checkboxes

[svos]

Hi,

I am writing a code where users have to select ALL the right answers in a question. I was thinking of using an associative array but am not sure how to do it.

Can someone help please?

Example of my Question:

Which of the following is true about PHP
1. It's open source language
2. It's easy to use
3. Its only executes client side scripting
4. It executes client and server side scripting.

Solution. If the users selects 1, 2 and 4 then they get
1 mark. But if they select 1 and 2 or 4 and 3 then they get zero marks.

Can someone guide me please.

Thanks
svos

[atomm]

Maybe:

In the html generated for the page with the checkboxes, have each checkbox be assigned a name in the format "QuestionXOptionY", where X is the question number and Y is the option (1, 2, 3, 4). So the third choice in the second question would be assigned the name Question2Option3.

Then, in your PHP code:

<?php
//...
if (!($_POST['QuestionXOption1'] || $_GET['QuestionXOption1']) && ($_POST['QuestionXOption2'] || $_GET['QuestionXOption2']) && !($_POST['QuestionXOption3'] || $_GET['QuestionXOption3']) && ($_POST['QuestionXOption4'] || $_GET['QuestionXOption4']) {
    //do something: The person got this one right, options 2 and 4 were correct and the user chose those
}
?>

See the ! before the ($POST['QuestionXOptionY'] || $GET['QuestionXOptionY']) blocks, that's there for the options that are not part of the correct answer.

[suntra]

You can try something like this... I didn't test it...

In the HTML page, use names like
question_1_1 for answer 1 of question 1
question_1_2 for answer 2 of question 1
question_1_3 for answer 3 of question 1
question_1_4 for answer 4 of question 1

Then, in the script, use something like this :

<?
$ans = $array(
           array(true, true, false, true), // answers for question 1
           array(false, false, true, true) // answers for question 2, etc...
          );
$points = array();
for($a = 0; $a < count($ans); $a++) {
     $points[$a] = 1;
     for($b = 1; $b <= count($ans[$a]); $a++) {
          if(isset($_POST["question_1_" . $b]) !=$ans[$a][$b]) {
               $points[$a] = 0;
               break;
          }
    }
}

I hope it can help. Give me a feedback.

[svos]

Thanks guys for replying but I am still having problems.

---

My HTML Question reads as follows

Q6. What are functions and when would you use them? Check all right answers

CB1 Functions are bunch of codes that are defined by the user

CB2 Functions are sort of like a box where you can put all a bunch of arguments and then call on them at once

CB3 Functions can be used when you want to print multiple answers

CB4 Functions are used when you want to call certain arguments multiple times in a code

---

The correct answers above is Check box 2 and 4. Users must select these two to receive a mark increment.

My PHP code reads as follows

// check answer for question 6 - multiple checkbox answer - use an array to increment mark

foreach($q6 as $answer)
{
if( $answer == "b") $mark1=1;
if ($answer == "d") $mark2=1;
}
If ($mark1 && $mark2) $correctanswers++;

It doesn't work. It totally ignores my array.