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PHP Create a PHP Quiz App

Posted by Brandy Fishback
Brandy Fishback
4,223 Points

How would I keep score in this simple quiz?

I have an array with the questions and answers. I put the answers in another array to shuffle them. Now I don't know how to access the "correctAnswer" to keep score. When I vardump it the answers come up at answer1, answer2 and answer3 instead of correctAnswer, firstIncorrectAnswer, and secondIncorrectAnswer. Here is my array and code.

<?php
 include ("inc/questions.php");
 session_start();

$pageTitle = "Math Quiz: Addition";

// if (!isset($_SESSION["score"])) {
//     $_SESSION["score"] = 0;

//shuffle questions and hold them in $_SESSION Variable
if(!$_SESSION) {
  shuffle($questions);
  $_SESSION['questions'] = $questions;
}

//keep track of what question the quiz is on
if ((!isset($_SESSION["counter"]) || $_SESSION["counter"] >9)){

  $_SESSION["counter"] = 1;

} else {
    $_SESSION["counter"] += 1;
}

//set the counter to 0
$index = $_SESSION["counter"] - 1;

//put the answers in an array ro shuffle them
$choices = [
  $_SESSION['questions'][$index]["correctAnswer"],
  $_SESSION['questions'][$index]["firstIncorrectAnswer"],
  $_SESSION['questions'][$index]["secondIncorrectAnswer"],
];
shuffle($choices);

?>

<html lang="en">
<head>
    <meta charset="UTF-8">
    <title><?php echo "$pageTitle";?> </title>
    <link href='https://fonts.googleapis.com/css?family=Playfair+Display:400,400italic,700,700italic' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/normalize.css">
    <link rel="stylesheet" href="css/styles.css">
</head>
<body>
    <div class="container">
        <div id="quiz-box">

            <p class="breadcrumbs"> <?php echo "Question Number "  . $_SESSION["counter"] . " of " . "10"; ?>
            <p class="quiz"><?php echo "What is " . $_SESSION['questions'][$index]["leftAdder"] . " + " . $_SESSION['questions'][$index]["rightAdder"];?></p>
            <form action="index.php" method="post">
                <input type="hidden" name="id" value="0"/>
                <input type="submit" class="btn" name="answer1" value="<?php echo $choices[0];?>" />
                <input type="submit" class="btn" name="answer2" value="<?php echo $choices[1];?>" />
                <input type="submit" class="btn" name="answer3" value="<?php echo $choices[2];?>" />
            </form>
            <?php
            if($_SESSION['counter'] == 10) {
              session_destroy();
            } ?>
        </div>
    </div>

</body>
</html>

My 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
    ];