error

//cek apakah nama sudah tersedia di dalam database atau belum
    $query = "SELECT * FROM data WHERE nama='$nama' OR email='$nama' LIMIT 1";
    $result = mysqli_query($conn, $query);
    $user = mysqli_fetch_assoc($result);

    if($user['nama'] === $nama) {

        echo "<script> alert('Nama Sudah Digunakan'); </script>";
    }

    else{

        echo "<script> alert('Nama Bisa Digunakan'); </script>";
    }

    if ($user['email'] === $email) {

        echo "<script> alert('Email Sudah Digunakan'); </script>";
    }

    else{

        echo "<script> alert('Email Bisa Digunakan'); </script>";
    }


    //check lagi apakah ada username yg sama dalam database
    if($user['nama'] === $nama  || empty($user['email']) === $email) {

    }

    else {

        //password enkripsi
        $password = password_hash($password, PASSWORD_ARGON2I);
        $cpassword =password_hash($cpassword, PASSWORD_ARGON2I);

        $query = "INSERT INTO data(nama, email, password, cpassword) VALUES('$nama','$email','$password','$cpassword')";

        $result = mysqli_query($conn, $query);

        return mysqli_affected_rows($conn);

    }