I want to design a php try it yourself interpreter like we have in w3schools.com for CSS and JS. I googled plenty of stuff i could not find something helpful. What i have tried so far is:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>
<body>
</div>
<form action="<?= $_SERVER["PHP_SELF"] ?>" method="POST">
<input type="submit">
<textarea name="code"><?= htmlentities($_POST["code"]) ?></textarea>
<div id="output">
<?= $_POST["code"] ?>
</div>
</body>
</html>
I have taken this code from on of the websites on web and honestly speaking its a part of my assignment, i just need some guidance.