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PHP Create a PHP Quiz App

Posted by Brandy Fishback
Brandy Fishback
4,223 Points

I have an array and a form. How do I pull randomized questions and answers from that array? Do I use array_rand?

//the form

div class="container">
        <div id="quiz-box">
            <p class="breadcrumbs">Question # of #</p>
            <p class="quiz"><?php echo "What is" . $questions["leftAdder"] . "+" . $questions ["rightAdder"];?></p>
            <form action="index.php" method="post">
                <input type="hidden" name="id" value="0"/>
                <input type="submit" class="btn" name="answer" value="<?php echo $questions ["correctAnswer"];?>" />
                <input type="submit" class="btn" name="answer" value="<?php echo $questions ["firstIncorrectAnswer"];?>" />
                <input type="submit" class="btn" name="answer" value="<?php echo $questions ["secondIncorrectAnswer"];?>" />
            </form>
        </div>

//the array

<?php
$questions[] =
    [
        "leftAdder" => 3,
        "rightAdder" => 4,
        "correctAnswer" => 7,
        "firstIncorrectAnswer" => 8,
        "secondIncorrectAnswer" => 10,
    ];
$questions[] =
    [
        "leftAdder" => 16,
        "rightAdder" => 32,
        "correctAnswer" => 48,
        "firstIncorrectAnswer" => 52,
        "secondIncorrectAnswer" => 61,
    ];
$questions[] =
    [
        "leftAdder" => 45,
        "rightAdder" => 12,
        "correctAnswer" => 57,
        "firstIncorrectAnswer" => 63,
        "secondIncorrectAnswer" => 55,
    ];
$questions[] =
    [
    "leftAdder" => 42,
    "rightAdder" => 18,
    "correctAnswer" => 60,
    "firstIncorrectAnswer" => 69,
    "secondIncorrectAnswer" => 57
    ];
$questions[] =
    [
    "leftAdder" => 96,
    "rightAdder" => 20,
    "correctAnswer" => 116,
    "firstIncorrectAnswer" => 120,
    "secondIncorrectAnswer" => 110
    ];
$questions[] =
    [
    "leftAdder" => 44,
    "rightAdder" => 85,
    "correctAnswer" => 129,
    "firstIncorrectAnswer" => 132,
    "secondIncorrectAnswer" => 126
    ];
$questions[] =
    [
    "leftAdder" => 51,
    "rightAdder" => 35,
    "correctAnswer" => 86,
    "firstIncorrectAnswer" => 96,
    "secondIncorrectAnswer" => 82
    ];
$questions[] =
    [
    "leftAdder" => 5,
    "rightAdder" => 61,
    "correctAnswer" => 66,
    "firstIncorrectAnswer" => 65,
    "secondIncorrectAnswer" => 74
    ];
$questions[] =
    [
    "leftAdder" => 26,
    "rightAdder" => 19,
    "correctAnswer" => 45,
    "firstIncorrectAnswer" => 40,
    "secondIncorrectAnswer" => 39
    ];
$questions[] =
    [
    "leftAdder" => 26,
    "rightAdder" => 35,
    "correctAnswer" => 61,
    "firstIncorrectAnswer" => 59,
    "secondIncorrectAnswer" => 51
    ];

10 Answers

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

you can use a array_rand() on the array to output a different key from the array, but I would also do a for each loop on the array so that you get the key and value echo'd out.

How did you get onto the tech degree for php? Thought it was only front end ? As I asked the staff and they said there was no such course.

:)

Brandy Fishback
Brandy Fishback
4,223 Points

Thank you for your help! I was awarded a scholarship through a Talent Path program.

https://teamtreehouse.com/go/talentpath

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

that is quite cool, if you are stuck with php do give me a shout I can lend a hand in it, be it procedural or OOP.

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

Thank you for offering help. I am brand new. I don't have a tech background. It is all so new to me but I am slowly getting there. I am still working on the quiz app. I have the array of 10 questions and answers. I am trying to get the app to show what number it is on like "question 2 of 10". Would I use a foreach loop?

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

what you'll have to do is, put this into a form, then you can get your array, and put the array into a if statement, then if the answer is true, then move onto the next question like:

//question array
$questions = [

          'question1' => ['What is my name?', 'James'],
          'question2' => ['Where do I live?', 'UK']

];

$questionCount = 0;

//this is a multidimensional array the outer array key is named $question1, then the inner array is [0] = Question [1] = answer
if($question1[0][1] === 'James'){
    echo 'correct';
//increments the question for each one they have right
   $questionCount++;
} else {
 echo 'wrong';
}

//the count then will increment up if correct, which you may use that to count
Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

Thank you so much for your help! I can't seem to get it to work. If you have time can you take a look at my code? https://github.com/BrandyLFishback/Project-Two

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

I can check for you sure, just will have to take a copy when I get home later on tonight, if this is ok?

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

That's perfect! Thank you so much. I've pretty much butchered the project! The two things I've been working on is trying to get array Rand to work, right now only one of the questions is showing up. And then the counter.

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

Can you create a new repository to store the files they provided?

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

Sure! Here you go https://github.com/BrandyLFishback/Project-Two-Starter-Files

I really appreciate your help!

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

I think I just got array_rand to work!!! I am so happy. One of the requirements is to make sure the questions are not repeated until the question bank has been exhausted. I am not sure if that is happening yet.

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

that's good, sorry didn't get on last night as been working flat out, how many projects do you get with this?

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

No Problem! I worked until 9 pm last night and work 11 hours today. I won't even get to work on it until tomorrow. We get 9 projects and a capstone. There are 12 of us in this cohort. 6 in PHP and 6 in Java.

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

I've just built the random question generator in pure OOP PHP, so now spits out random questions and the correct answer etc

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

I would love to see your random quote generator!! Our random quote generator was very basic. The six girls in Java did it too but for this second project we have different projects.

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

was there any loops used to loop over the array ? I will put it up on my github sometime today.

Brandy Fishback
Brandy Fishback
4,223 Points
Brandy Fishback
Brandy Fishback
4,223 Points

No their wasn't. Here is my random quote generator. I barley got it done. It was all so new to me. It is all starting to make sense to now:) https://github.com/BrandyLFishback/Project-1-Random-Quote-Generator/tree/master/a_random_quote_generator-v1

jamesjones21
jamesjones21
9,260 Points
jamesjones21
jamesjones21
9,260 Points

this is my OOP work in progress version:

RandomQuestion.php

<?php
// Generate random questions (Done)
// Loop for required number of questions
// Get random numbers to add (Done)
// Calculate correct answer
// Get incorrect answers within 10 numbers either way of correct answer
// Make sure it is a unique answer
// Add question and answer to questions array

include __DIR__ . '/Questions.php';

class RandomQuestions
{
    public $count = 0;
    public $used = [];

    public function generateRandomQuestions()
    {
        $randomArray = Questions::questionHolder();
        $rand = array_rand($randomArray, 1);
        $send = $randomArray[$rand];
        $this->count++;
        return $this->displayQuestion($send);
    }



    public function displayQuestion($question)
    {

        $randomQuestion = $question;

        $output = '<div>What is ' . $randomQuestion['leftAdder'] . ' + ' . $randomQuestion['rightAdder'] .'</div>';
        $output .= '<button type="submit" name="correctAnswer" class="number">' . ($randomQuestion['leftAdder'] + $randomQuestion['rightAdder']) . '</button>';
        $output .= '<button type="submit" name="firstIncorrectAnswer" class="number">'. $randomQuestion['firstIncorrectAnswer'] . '</button>';
        $output .= '<button type="submit" name="secondIncorrectAnswer" class="number">'. $randomQuestion['secondIncorrectAnswer'] . '</button>';

        return $output;

    }


    public function checkAnswer($correctAnswer, $firstWrong, $secondWrong)
    {
        $counter = $this->count;



        $counter++;
    }

}

$question = new RandomQuestions();
?>
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Math Quiz Addition</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="main.css" />

</head>
<body>
    <form action="<?php $_SERVER['PHP_SELF']; ?>" method="POST" class="form">
    <label>Question <?= $question->count; ?> out of <?= Questions::numberQuestions(); ?></label>
        <div class="content"></div>
            <?= $question->generateRandomQuestions(); ?>
        </div>


    </form>
<script src="../main.js"></script>
</body>
</html>

Questions.php

<?php

class Questions

{
    public static $correct = [];

    public static function questionHolder()
    {
        $questions[] =
            [
                "leftAdder" => 3,
                "rightAdder" => 4,
                "correctAnswer" => 7,
                "firstIncorrectAnswer" => 8,
                "secondIncorrectAnswer" => 10,
            ];
        $questions[] =
            [
                "leftAdder" => 16,
                "rightAdder" => 32,
                "correctAnswer" => 48,
                "firstIncorrectAnswer" => 52,
                "secondIncorrectAnswer" => 61,
            ];
        $questions[] =
            [
                "leftAdder" => 45,
                "rightAdder" => 12,
                "correctAnswer" => 57,
                "firstIncorrectAnswer" => 63,
                "secondIncorrectAnswer" => 55,
            ];
        $questions[] =
            [
            "leftAdder" => 42,
            "rightAdder" => 18,
            "correctAnswer" => 60,
            "firstIncorrectAnswer" => 69,
            "secondIncorrectAnswer" => 57
            ];
        $questions[] =
            [
            "leftAdder" => 96,
            "rightAdder" => 20,
            "correctAnswer" => 116,
            "firstIncorrectAnswer" => 120,
            "secondIncorrectAnswer" => 110
            ];
        $questions[] =
            [
            "leftAdder" => 44,
            "rightAdder" => 85,
            "correctAnswer" => 129,
            "firstIncorrectAnswer" => 132,
            "secondIncorrectAnswer" => 126
            ];
        $questions[] =
            [
            "leftAdder" => 51,
            "rightAdder" => 35,
            "correctAnswer" => 86,
            "firstIncorrectAnswer" => 96,
            "secondIncorrectAnswer" => 82
            ];
        $questions[] =
            [
            "leftAdder" => 5,
            "rightAdder" => 61,
            "correctAnswer" => 66,
            "firstIncorrectAnswer" => 65,
            "secondIncorrectAnswer" => 74
            ];
        $questions[] =
            [
            "leftAdder" => 26,
            "rightAdder" => 19,
            "correctAnswer" => 45,
            "firstIncorrectAnswer" => 40,
            "secondIncorrectAnswer" => 39
            ];
        $questions[] =
            [
            "leftAdder" => 26,
            "rightAdder" => 35,
            "correctAnswer" => 61,
            "firstIncorrectAnswer" => 59,
            "secondIncorrectAnswer" => 51
            ];

            return $questions;
    }

    public static function numberQuestions()
    {
       return count(self::questionHolder());


    }

}

So the code above generates a random question on each press, so all that is left to do is count the each correct question, randomise the answer buttons. which I do feel that this version will work best with a database as can't store answers lol Also the above comments at the very top is for the JS version?

hopefully you'll see how this works