<?php
include 'functions.class.php';
$functions = new Functions();
if (isset($_POST['submit'])) {
    $data = $functions->calculate_horizontal_cylinder_volume($_POST['radius_mm'],  ($_POST['radius_mm'] * 2) - $_POST['distance'], $_POST['length_mm']);
    var_dump($data);
}


?>

<!DOCTYPE html>
<html>

<head>
    <title>Horizontal Cylinder Volume</title>
</head>

<body>
    <h1>Horizontal Cylinder Volume</h1>
    <form action="" method="post">
        <label for="radius">Radius (mm): </label>
        <input type="text" name="radius_mm" id="radius"><br>
        <label for="length">Length (mm): </label>
        <input type="text" name="length_mm" id="length"><br>
        <label for="length">Measurment (mm): </label>
        <input type="text" name="distance" id="length"><br>
        <input type="submit" name="submit" value="Calculate">
    </form>