0, 'time' => time()];
$loginErr = $_SESSION[$lockKey];
if (time() - $loginErr['time'] > 300) {
$_SESSION[$lockKey] = ['num' => 0, 'time' => time()];
$loginErr = $_SESSION[$lockKey];
}
// 登录提交处理
if ($_POST) {
$username = trim($_POST['username'] ?? '');
$pwd = trim($_POST['pwd'] ?? '');
if ($loginErr['num'] >= 5) {
$errMsg = "密码错误次数过多，请等待5分钟后重试";
} elseif (!$username || !$pwd) {
$errMsg = "账号与密码不能为空";
} else {
$conn = mysqli_connect($dbHost, $dbUser, $dbPass, $dbName);
$u = mysqli_real_escape_string($conn, $username);
$sql = "SELECT id,username,password,role FROM sys_user WHERE username='$u' LIMIT 1";
$res = mysqli_query($conn, $sql);
$user = mysqli_fetch_assoc($res);
if ($user && password_verify($pwd, $user['password'])) {
$_SESSION[$lockKey] = ['num' => 0, 'time' => time()];
$_SESSION['user_id'] = $user['id'];
$_SESSION['username'] = $user['username'];
$_SESSION['role'] = $user['role'];
$_SESSION['login_time'] = time();
mysqli_query($conn, "UPDATE sys_user SET last_login=NOW() WHERE id=" . $user['id']);
header("Location: dashboard.php");
exit;
} else {
$_SESSION[$lockKey]['num']++;
$errMsg = "账号或密码输入错误";
}
mysqli_close($conn);
}
}
?>
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