public function ambilSiswa($nomorSiswa)
{
$ps = $this->connection->prepare("SELECT * FROM siswa WHERE nomor_siswa=:nomorSiswa");
$ps->bindParam(":nomorSiswa", $nomorSiswa);
$ps->execute();
$rs = $ps->fetchAll();
foreach ($rs as $s) {
$siswa = new Siswa();
$siswa->setNomorSiswa($s["nomor_siswa"]);
$siswa->setNama($s['nama']);
$siswa->getKelas()->setIdKelas($s["id_kelas"]);
return $siswa;
}
}