<!DOCTYPE html>
<html>
  <head>
    <title>[PHP] HTML Beautifier</title>
  </head>
  <body>
    <div>
      <h2>Example</h2>
      <p>Hello World!</p>
      <ol>
        <li>line 1</li>
        <li>line 2</li>
        <li>line 3</li>
      </ol>
    </div>
  </body>
</html>