function list_exercises($username) { // Ham lay danh sach bai tap hien thi len dau trang $exercises = ''; $conn = get_connection(); $sql = "SELECT * FROM Exercise LIMIT 0,30"; $result = mysqli_query($conn, $sql); if ($result->num_rows > 0) { $exercises = '<ul id="exercise">'; $exercises .= '<li>'; $exercises .= '<a href="practice.php">Ôn tập</a>'; $exercises .= '<p>Tập lập trình</p>'; $exercises .= '</li>'; while ($row = $result->fetch_assoc()) { $exercises .= '<li>'; if (active_exercise($row["exercise_id"], $username)) { $exercises .= '<a href="do_exercise.php?id=' . $row["exercise_id"] . '">Bài số ' . $row["exercise_id"] . '</a>'; $exercises .= '<p>' . $row["name"] . '</p>'; } else { $exercises .= 'Bài số ' . $row["exercise_id"]; $exercises .= '<p>' . $row["name"] . '</p>'; } $exercises .= '</li>'; } $exercises .= '</ul>'; } $conn->close(); return $exercises; }
<?php require 'libs/checklogin.php'; require 'libs/functions.php'; $username = $_SESSION["username"]; $exerid = $_GET['id']; if (!active_exercise($exerid, $username)) { header('Location: practice.php'); } ?> <html> <head> <title>Pascal 4fun | Thực hành</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="css/style.css"> <link rel="stylesheet" href="js/lib/codemirror.css"> <script src="js/lib/codemirror.js"></script> <script src="js/mode/pascal/pascal.js"></script> <script src="js/jquery-1.11.3.js"></script> <script src="js/script.js"></script> </head> <body> <?php if ($exerid == null || $exerid == '') { $exerid = 0; }