What is the best practice for storing user answers in a session when dealing with dynamic quiz forms in PHP?

When dealing with dynamic quiz forms in PHP, the best practice for storing user answers in a session is to use an associative array to keep track of the answers for each question. This allows for easy retrieval and updating of answers as the user progresses through the quiz. 

// Start the session
session_start();

// Initialize an empty array to store user answers
if(!isset($_SESSION['user_answers'])) {
    $_SESSION['user_answers'] = [];
}

// Update user answers based on form submission
if($_SERVER['REQUEST_METHOD'] == 'POST') {
    foreach($_POST as $question_id => $answer) {
        $_SESSION['user_answers'][$question_id] = $answer;
    }
}

// Retrieve user answers for a specific question
function getUserAnswer($question_id) {
    if(isset($_SESSION['user_answers'][$question_id])) {
        return $_SESSION['user_answers'][$question_id];
    } else {
        return null;
    }
}

Keywords

session user answers dynamic quiz forms PHP storing

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