<?php
require "equation.php";
if (isset($_POST['submit'])) {
$equation = new Equation($_POST['equation']);
echo 'Infix: ' . $equation->getInfix();
echo '<br>Evaluation: ' . $equation->evaluate();
}
?>
<html>
<body>
<form method="post">
<input type="text" name="equation"/>
<button type="submit" name="submit" value="submit">Submit</button>
</form>
</body>
</html>
