مبارزه با نمایش تصویر و متغیرهای تعریف نشده در اسکریپت PHP – به کمک نیاز دارید!

session_start();
include_once 'db_connect.php';

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Handle logout if logout parameter is set
if (isset($_GET['logout']) && $_GET['logout'] == 'true') {
    $_SESSION = array();
    session_destroy();
    header("Location: onlineshop.php");
    exit();
}

// Check if the user is logged in
if (isset($_SESSION['user_id'])) {
    $navbar_links = '
        

            Profile
        
        

            Logout
        
    ';
} else {
    $navbar_links = '
        

            Login
        
        

            Register
        
    ';
}

// Fetch products from database
$sql_fetch_products = "SELECT * FROM products";
$result = $conn->query($sql_fetch_products);

if (!isset($_SESSION['user_id'])) {
    header("Location: login.php");
    exit();
}

$user_id = $_SESSION['user_id'];

// Fetch username based on user_id
$sql = $conn->prepare("SELECT username FROM users WHERE id = ?");
$sql->bind_param('i', $user_id);
$sql->execute();
$sql->bind_result($username);
$sql->fetch();
$sql->close();

// Fetch chat messages
$chat_query = "SELECT * FROM chat_messages WHERE sender="$username" OR receiver="$username" ORDER BY timestamp DESC";
$chat_result = $conn->query($chat_query);

// Handle sending chat messages
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['chat_message'])) {
    $receiver = 'admin'; // Static value for admin
    $message = $_POST['chat_message'];
    $sender = $username;

    $stmt = $conn->prepare("INSERT INTO chat_messages (sender, receiver, message) VALUES (?, ?, ?)");
    $stmt->bind_param("sss", $sender, $receiver, $message);
    $stmt->execute();
    $stmt->close();
    header("Location: onlineshop.php");
    exit;
}
?>


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