setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
error_log("Database connected successfully");
} catch (PDOException $e) {
error_log("Database connection error: " . $e->getMessage());
die("Database connection error");
}
$error = '';
$success = '';
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$username = filter_input(INPUT_POST, 'username', FILTER_SANITIZE_STRING);
$password = filter_input(INPUT_POST, 'password', FILTER_SANITIZE_STRING);
error_log("Login attempt for user: " . $username);
if ($username && $password) {
try {
$stmt = $db->prepare('SELECT id, password, is_blocked, login_attempts, last_attempt FROM users WHERE username = ?');
$stmt->execute([$username]);
$user = $stmt->fetch(PDO::FETCH_ASSOC);
error_log("User query result: " . print_r($user, true));
if ($user) {
if ($user['is_blocked']) {
$error = 'Account is blocked';
error_log("Blocked account attempt: " . $username);
} else if ($user['login_attempts'] >= 5 && strtotime($user['last_attempt']) > strtotime('-15 minutes')) {
$error = 'Too many login attempts';
error_log("Too many attempts for user: " . $username);
} else if (password_verify($password, $user['password'])) {
$stmt = $db->prepare('UPDATE users SET login_attempts = 0, last_attempt = NOW() WHERE id = ?');
$stmt->execute([$user['id']]);
$_SESSION['user_id'] = $user['id'];
$_SESSION['username'] = $username;
error_log("Successful login for user: " . $username);
header('Location: index.php');
exit;
} else {
$stmt = $db->prepare('UPDATE users SET login_attempts = login_attempts + 1, last_attempt = NOW() WHERE id = ?');
$stmt->execute([$user['id']]);
$error = 'Invalid password';
error_log("Invalid password for user: " . $username);
}
} else {
$error = 'User not found';
error_log("User not found: " . $username);
}
} catch (PDOException $e) {
error_log("Login error: " . $e->getMessage());
error_log("SQL State: " . $e->getCode());
error_log("Error Info: " . print_r($e->errorInfo, true));
$error = 'Server error';
}
}
}
?>
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