<form method="POST">
    <h3>Editing: MarkdownConverter.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell &lt;colinodell@gmail.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark;

use League\CommonMark\Environment\EnvironmentInterface;
use League\CommonMark\Exception\CommonMarkException;
use League\CommonMark\Output\RenderedContentInterface;
use League\CommonMark\Parser\MarkdownParser;
use League\CommonMark\Parser\MarkdownParserInterface;
use League\CommonMark\Renderer\HtmlRenderer;
use League\CommonMark\Renderer\MarkdownRendererInterface;

class MarkdownConverter implements ConverterInterface, MarkdownConverterInterface
{
    /** @psalm-readonly */
    protected EnvironmentInterface $environment;

    /** @psalm-readonly */
    protected MarkdownParserInterface $markdownParser;

    /** @psalm-readonly */
    protected MarkdownRendererInterface $htmlRenderer;

    public function __construct(EnvironmentInterface $environment)
    {
        $this-&gt;environment = $environment;

        $this-&gt;markdownParser = new MarkdownParser($environment);
        $this-&gt;htmlRenderer   = new HtmlRenderer($environment);
    }

    public function getEnvironment(): EnvironmentInterface
    {
        return $this-&gt;environment;
    }

    /**
     * Converts Markdown to HTML.
     *
     * @param string $input The Markdown to convert
     *
     * @return RenderedContentInterface Rendered HTML
     *
     * @throws CommonMarkException
     */
    public function convert(string $input): RenderedContentInterface
    {
        $documentAST = $this-&gt;markdownParser-&gt;parse($input);

        return $this-&gt;htmlRenderer-&gt;renderDocument($documentAST);
    }

    /**
     * Converts Markdown to HTML.
     *
     * @deprecated since 2.2; use {@link convert()} instead
     *
     * @param string $markdown The Markdown to convert
     *
     * @return RenderedContentInterface Rendered HTML
     *
     * @throws CommonMarkException
     */
    public function convertToHtml(string $markdown): RenderedContentInterface
    {
        \trigger_deprecation('league/commonmark', '2.2.0', 'Calling &quot;convertToHtml()&quot; on a %s class is deprecated, use &quot;convert()&quot; instead.', self::class);

        return $this-&gt;convert($markdown);
    }

    /**
     * Converts CommonMark to HTML.
     *
     * @see MarkdownConverter::convert()
     *
     * @throws CommonMarkException
     */
    public function __invoke(string $markdown): RenderedContentInterface
    {
        return $this-&gt;convert($markdown);
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>