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Dosya Düzenle: edit_quiz.php

<?php
session_start();
include("../config.php");

// Redirect if admin not logged in
if(!isset($_SESSION['admin_id'])){
    header("Location: admin_login.php");
    exit;
}

$admin_name = $_SESSION['admin_name'];
$error = '';
$success = '';

if(!isset($_GET['quiz_id'])){
    die("Quiz ID not provided.");
}

$quiz_id = intval($_GET['quiz_id']);

// Fetch quiz details
$quiz_res = mysqli_query($conn, "SELECT * FROM quizzes WHERE quiz_id='$quiz_id'");
if(mysqli_num_rows($quiz_res) == 0){
    die("Quiz not found.");
}
$quiz = mysqli_fetch_assoc($quiz_res);

// Handle form submission
if($_SERVER['REQUEST_METHOD'] == 'POST'){
    $title = mysqli_real_escape_string($conn, $_POST['title']);
    $description = mysqli_real_escape_string($conn, $_POST['description']);
    $total_questions = intval($_POST['total_questions']);
    $duration = intval($_POST['duration']);

if($title == '' || $total_questions < 1 || $duration < 1){
        $error = "Please fill all fields correctly.";
    } else {
        $update = mysqli_query($conn, "UPDATE quizzes SET title='$title', description='$description', total_questions='$total_questions', duration='$duration' WHERE quiz_id='$quiz_id'");
        if($update){
            $success = "Quiz updated successfully!";
            // Refresh quiz details
            $quiz = mysqli_fetch_assoc(mysqli_query($conn, "SELECT * FROM quizzes WHERE quiz_id='$quiz_id'"));
        } else {
            $error = "Database error: ".mysqli_error($conn);
        }
    }
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Edit Quiz - <?php echo htmlspecialchars($quiz['title']); ?></title>
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap" rel="stylesheet">
<style>
body { font-family: 'Poppins', sans-serif; background: #f4f6f8; margin:0; }
.navbar { background: linear-gradient(90deg,#6a11cb,#2575fc); color: white; padding: 15px 50px; display:flex; justify-content: space-between; align-items: center; }
.navbar a { color:white; text-decoration: none; margin-left:20px; font-weight:600; }
.navbar a:hover { text-decoration: underline; }
.container { width: 600px; margin: 50px auto; background: #fff; padding: 30px; border-radius: 12px; box-shadow: 0 10px 20px rgba(0,0,0,0.15); }
h2 { color: #6a11cb; text-align: center; margin-bottom: 20px; }
form input, form textarea { width: 100%; padding: 12px; margin: 10px 0; border-radius: 8px; border:1px solid #ccc; }
form button { width: 100%; background: #2575fc; color:white; border:none; padding:12px; border-radius:8px; font-weight:600; cursor:pointer; transition:0.3s; }
form button:hover { background: #6a11cb; }
.message { text-align:center; margin-bottom:15px; font-weight:600; }
.success { color: green; }
.error { color: red; }
</style>
</head>
<body>

<div class="navbar">
    <h1>Admin Panel</h1>
    <div>
        Welcome, <b><?php echo htmlspecialchars($admin_name); ?></b> |
        <a href="index.php">Dashboard</a> |
        <a href="admin_logout.php">Logout</a>
    </div>
</div>

<div class="container">
    <h2>Edit Quiz: <?php echo htmlspecialchars($quiz['title']); ?></h2>
    <?php if($error) echo "<p class='message error'>$error</p>"; ?>
    <?php if($success) echo "<p class='message success'>$success</p>"; ?>
    <form method="post">
        <input type="text" name="title" placeholder="Quiz Title" value="<?php echo htmlspecialchars($quiz['title']); ?>" required>
        <textarea name="description" placeholder="Quiz Description" rows="3"><?php echo htmlspecialchars($quiz['description']); ?></textarea>
        <input type="number" name="total_questions" placeholder="Total Questions" value="<?php echo $quiz['total_questions']; ?>" min="1" required>
        <input type="number" name="duration" placeholder="Duration (minutes)" value="<?php echo $quiz['duration']; ?>" min="1" required>
        <button type="submit">Update Quiz</button>
    </form>
</div>

</body>
</html>

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