addCourse.php

<?php
    session_start();
    require 'DatabaseConnection.php';

    if (!isset($_SESSION['user_id'])) {
        header("Location: login.php");
        exit;
    }

    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $db = new Database();
        $studentId = $_SESSION['user_id'];
        $courseId = $_POST['course_id'];
        $semester = "Fall 2025";

        $result = $db->registerCourse($studentId, $courseId, $semester);
        if ($result) {
            echo "Course registered successfully!";
        } else {
            echo "Failed to register course.";
        }
    }
?>
<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Register for a Course</title>
    </head>
    <body>
        <?php include 'header.php';?>
        <h1>Register for a Course</h1>
        <form action="addCourse.php" method="POST">
            <label for="course_id">Course ID:</label>
            <input type="text" name="course_id" required>
            <button type="submit">Register</button>
        </form>
        <a href="dashboard.php">Back to Dashboard</a>
    </body>
</html>