[RESOLVED] Looking for suggestions on keeping radio button values private (for a quiz).

dmacman1962

Hi all,

I am working on a quiz, each question has 4 possible answers and I am looking for suggestions on keeping the correct answers private.

I know PHP5 has that ability in writing a function, but I have very little OOP experience, especially in PHP5.

For example...

<input type="radio" name="q1[]" value="0">
<input type="radio" name="q1[]" value="0">
<input type="radio" name="q1[]" value="1"><!-- correct answer -->
<input type="radio" name="q1[]" value="0">

There is only 13 questions, and I thought creating a database for the answers and then checking them was overkill.

I appreciate any guidance.

Thanks,

Don

madwormer2

You could put the answers in an array, name the radio buttons question1,2,3 etc. and have the values 1,2,3, etc. for the answer no. Then check the array to see if the answer number is the same as the one in the answer array.

It'd pretty much be:

<input type="radio" name="q1" value="1"> <input type="radio" name="q1" value="2"> <input type="radio" name="q1" value="3"><!-- correct answer --> <input type="radio" name="q1" value="4">

$answers = Array(3,3,1,3,2,1,1,1,2,3); 
if($_POST['q1'] == $answers[0]){
echo 'correct';
} else { echo 'false';}

dmacman1962

Ok, I follow you.

So if I did this...

$a=0;
$ar=0;
for ($k=1; $k<=13; $k++) {
$answers = array(3, 4, 4, 3, 1, 2, 1, 4, 2, 3, 3, 3, 2);
if($_POST['q'.$k] == $answers['$ar']){
$a++;
} else { 
//continue
} 
$question = ${'$q'.$k.'[$ar]'};
echo '<br>----------->>' . $question;
echo '<br>' . 'q' . $k .  '=' . $question . '<br>';
$ar++;
}
die('<br><br>You answered ' . $a . ' questions correctly!');

But I am stuck trying to get the values dynamically. I think what I am trying to do a is a variable variable, but after 2 hours of testing and reading on the web, i still get no vlaue for my arrays.

Where am I missing the answer?

Thanks,

Don

madwormer2

This line: if($POST['q'.$k] == $answers['$ar']){
Should probably be: if($POST['q'.$k] == $answers[$k]){

If you still can't get it to work, post EVERYTHING as an attachment, and it should be easier to fix (html and all).

dmacman1962

No problemo,

I did try your fix, and it did not resolve it.

zip of my files

I stripped out the code that I was not using and commeted the best I could.

Thanks for helping!

Don

madwormer2

Corrupt archive?

dmacman1962

I re-zipped it and tried it, it works now.zip files

dmacman1962

I resolved this.

Here is the working solution. If there is a better way, especially using OOP in PHP5, please let me know.

$a=0;
$ar=0;
for ($k=1; $k<=13; $k++) {
$answers = array(3, 4, 4, 3, 1, 2, 1, 4, 2, 3, 3, 3, 2); //this is the correct answers
if($_POST['q'.$k] == $answers[$ar]){ //check each answer against its value in the array
$a++;
} else { 
//continue
} 
//$question = ${'$q'.$k.'[$ar]'}; //assign the each value in the array to avariable
$question = $_POST['q'.$k]; //assign the each value in the array to avariable

//echo '<br>----------->>' . $question; //echo it to see it it has a correct value
//echo '<br>' . 'q' . $k .  '=' . $question . '<br>'; //do this for each one
$ar++;
}
die('<br><br>You answered ' . $a . ' questions correctly!'); //show the answers they got right

Thanks,
Don

madwormer2

?>
<html>
<head>
</head>
<title>Online test results</title>
<link href="../font.css" rel="stylesheet" type="text/css" />
<body>
<div align="center" class="font">
<?php
$a=0;
$ar=0;
$answers = array(NULL,3, 4, 4, 3, 1, 2, 1, 4, 2, 3, 3, 3, 2, 3); //this is the correct 
for ($k=1; $k<=13; $k++) {
answers, the null is because arrays start at 0
if(@$_POST['q'.$k] == $answers[$k]){ //check each answer against its value in the array
$a++;
} else { 
//continue
} 
$question = $k; //assign the each value in the array to avariable
if(!isset($_POST['q'.$k])){
echo '<br> Question: <b>' . $k . '</b>. You didn\'t answer';
}else{
echo '<br> Question: <b>' . $k . '</b>. You answered ' . @$_POST['q'.$k] . ' which was ' . ((@$_POST['q'.$k] == $answers[$k])?'correct':'incorrect');
}
$ar++;
}
die('<br><br>You answered ' . $a . ' questions correctly!'); //show the answers they got right

?>
<br />
<br />
</div>
</body>
</html>

Edit: You had to go and fix it didn't you.

Actually, your code wouldn't work, it'll only check if the answer is 3 each time.
Edit: oh, just saw it 😉 it doesn.t

dmacman1962

Hi Madwormer2,

I posted a similar solution at the same time as you, but I like your solution better!

Thanks for the help,

Don

madwormer2

You're welcome. I get bored sometimes, at least this gave me something to do 😉