cal-php/Cal.php at master · sahininayanthara/cal-php · GitHub

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<html>
<body>
<form>
<input type="text" name="num1" placeholder="first number">
<input type="text" name="num2" placeholder="second number">
<select name="operator">
<option>None</option>
<option>Add</option>
<option>Subtract</option>
<option>Multiply</option>
<option>Divide</option>
<option>Module</option>
</select>
<br>
<br>
<button type="submit" name="submit" value="submit">Calculate</button>
</form>
<p>The answer is:</p>

<?php
if (isset($_GET[ 'submit' ] )){

$number1= $_GET[ 'num1' ];
$number2= $_GET[ 'num2' ];
$operator= $_GET[ 'operator' ];

switch($operator){
case "None":
echo "You need to select a method!";
break;

case "Add":
echo $number1 + $number2;
break;

case "Subtract":
echo $number1 - $number2;
break;

case "Multiply":
echo $number1 * $number2;
break;

case "Divide":
echo $number1 / $number2;
break;

case "Module":
echo $number1 % $number2;
break;
}


}


?>
</body>
</html>