public function ubahSiswa(Siswa $siswa)
{
$nama = $siswa->getNama();
$kelas = $siswa->getKelas()->getIdKelas();
$nomorSiswa = $siswa->getNomorSiswa();
$ps = $this->connection->prepare("UPDATE siswa SET nama=:nama, id_kelas=:kelas where nomor_siswa=:nomorSiswa ");
$ps->bindParam(":nama", $nama, PDO::PARAM_STR, 50);
$ps->bindParam(":kelas", $kelas, PDO::PARAM_INT);
$ps->bindParam(":nomorSiswa", $nomorSiswa, PDO::PARAM_INT);
$ps->execute();
$this->connection = null;
}
