Question

Does anyone know how to get, or where to get, or how to make, or where to find a tutorial, about the w3schools try it editor?

I need an editor like it, so when typing js/html/css the code be accepted and shown like the tryit editor.

Answer 1

The “editor” you are referring to is nothing more but:

<form action="<?= $_SERVER["PHP_SELF"] ?>" method="POST">
<input type="submit">

<textarea name="code"><?= htmlentities($_POST["code"]) ?></textarea>

<div id="output">
  <?= $_POST["code"] ?>
</div>

And the PHP form sending could even be replaced by:

<button onclick='$("#output").html( $("textarea#code").value )'>