prepare("SELECT id, username, password FROM account WHERE username = ?");
$stmt->bind_param("s", $username);
$stmt->execute();
$result = $stmt->get_result();
if ($result->num_rows > 0) {
$user = $result->fetch_assoc();
if (password_verify($password, $user["password"])) {
$_SESSION["user_id"] = $user["id"];
$_SESSION["username"] = $user["username"];
header("Location: index.php");
exit();
} else {
$error = "Sai mật khẩu!";
}
} else {
$error = "User không tồn tại!";
}
}
?>
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