<blockquote><h2>This is a header.</h2> <ol> <li>This is the first list item.</li> <li>This is the second list item.</li> </ol> <p>Here's some example code:</p> <pre><code>return shell_exec("echo $input | $markdown_script"); </code></pre> <blockquote><p>quote here</p> </blockquote> </blockquote>