What are some best practices for implementing a security question feature in a PHP registration form?

To implement a security question feature in a PHP registration form, it is important to choose questions that are not easily guessable and provide an added layer of security. Additionally, it is crucial to store the answers securely, such as hashing them before storing in the database. Finally, make sure to validate the user's answer against the stored answer during the registration process. 

// Sample code snippet for implementing a security question feature in a PHP registration form

// Define an array of security questions and their corresponding answers
$securityQuestions = array(
    "What is your mother's maiden name?" => "answer1",
    "In what city were you born?" => "answer2",
    "What is the name of your first pet?" => "answer3"
);

// Retrieve the selected security question and user's answer from the form submission
$selectedQuestion = $_POST['security_question'];
$userAnswer = $_POST['security_answer'];

// Validate the user's answer against the stored answer
if (array_key_exists($selectedQuestion, $securityQuestions) && $securityQuestions[$selectedQuestion] === $userAnswer) {
    // Proceed with the registration process
    // Additional code for registration goes here
} else {
    // Display an error message for incorrect answer
    echo "Incorrect answer to security question. Please try again.";
}

Keywords

SQL injection CSRF protection password hashing input validation captcha integration

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