perhitungan

<html>
<head>
<title>Operators PHP</title>
</head>
<body>
<h2>Contoh Penggunaan Operator pada PHP</h2>
<form action="" method="post">
<input type="text" name="operand1" value="0" />
<select name="operator">
<option value="–">pengurangan(-)</option>
<option value="+">pertambahan(+)</option>
<option value="/">pembagian(/)</option>
<option value="*">perkalian(*)</option>
<option value="%">prosentase(%)</option>
</select>
<input type="text" name="operand2" value="0" />
<input type="Submit" name="Submit" value="Proses" />
</form>
</body>
</html>
<?php
  if(isset($_POST['Submit'])? $_POST['Submit'] : ''){
  $angka1=$_POST['operand1'];
  $operator=$_POST['operator'];
  $angka2=$_POST['operand2'];

if ($operator == '+')
{
$hasil = $angka1+$angka2;
}
if ($operator == '-')
{
$hasil = $angka1-$angka2;
}
if ($operator == '*')
{
$hasil = $angka1*$angka2;
}
if ($operator == '/')
{
$hasil = $angka1/$angka2;
}
if ($operator == '%')
{
$hasil = $angka1%$angka2;
}
echo "Hasilnya Perhitungan Matematika = $hasil";
}
else{
}
?>