1. Open your notepad on your computer and paste the following code:
<html>
<head>
<title>Basic PHP Calculator</title>
</head>
<body>
<h1>My PHP Calculator</h1>
<form method="post">
<label for="">Enter 1st Value :</label>
<input type="number" name="add1"><br>
<label for="">Enter 2nd Value :</label>
<input type="number" name="add2"><br>
<input type="submit" value="Calculate" name="Calme"><br/><br/>
<?php
if(isset($_POST["Calme"]))
{
$add=$_POST["add1"] + $_POST["add2"];
echo "Total Sum = ". $add;
}
?>
</form>
</body>
</html>
2. Save as: mycalc.php
Output
