How can the PHP code be modified to ensure that questions selected based on user preferences are displayed accurately?

To ensure that questions selected based on user preferences are displayed accurately, we can modify the PHP code to include the user's preferences as criteria for selecting questions from the database. This can be done by adding a WHERE clause to the SQL query that filters questions based on the user's preferences. 

// Assuming $userPreferences is an array containing the user's preferences
$userPreferences = ['category' => 'Science', 'difficulty' => 'Medium'];

// Modify the SQL query to select questions based on user preferences
$sql = "SELECT * FROM questions WHERE category = :category AND difficulty = :difficulty";
$stmt = $pdo->prepare($sql);
$stmt->execute(['category' => $userPreferences['category'], 'difficulty' => $userPreferences['difficulty']]);

// Fetch and display the selected questions
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    echo $row['question_text'] . "<br>";
}

Keywords

PHP user preferences modification accurate display question selection

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