Membuat Kalkulator Sederhana Dengan PHP

Ketik script php dibawah ini dengan menggunakan notepad, dan simpan dengan nama_file.php.

x = $x;
    $this->y = $y;
    $hasil = $this->x + $this->y;
    return $hasil;
  }

  public function Kali($x, $y)
  {
    $this->x = $x;
    $this->y = $y;
    $hasil = $this->x * $this->y;
    return $hasil;
  }

  public function Kurang($x, $y)
  {
    $this->x = $x;
    $this->y = $y;
    $hasil = $this->x - $this->y;
    return $hasil;
  }

  public function Bagi($x, $y)
  {
    $this->x = $x;
    $this->y = $y;
    $hasil = $this->x / $this->y;
    return $hasil;
  }

  public function TampilkanForm()
  {
    echo '
';
    echo '  ';
    echo '
      +
      x
      -
      /
      ';
    echo '  ';
    echo '=  ';
    echo '';
    echo '
';
  }
}

$data = new Matematika();
$data->TampilkanForm();

if ($_POST) {
  $x = $_POST['x'];
  $y = $_POST['y'];
  if ($_POST['operasi'] == "tambah") {
    echo "Hasil ".$x." + ".$y." = ".$data->Tambah($x, $y)."

";
  } elseif ($_POST['operasi'] == "kali") {
    echo "Hasil ".$x." x ".$y." = ".$data->Kali($x, $y)."

";
  } elseif ($_POST['operasi'] == "kurang") {
    echo "Hasil ".$x." - ".$y." = ".$data->Kurang($x, $y)."

";
  } elseif ($_POST['operasi'] == "bagi") {
    echo "Hasil ".$x." / ".$y." = ".$data->Bagi($x, $y)."

";
  }
}
?>

Hasilnya sebagai berikiut.

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