<form method="POST">
    <h3>Editing: Diff.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);
/*
 * This file is part of sebastian/diff.
 *
 * (c) Sebastian Bergmann &lt;sebastian@phpunit.de&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\Diff;

final class Diff
{
    /**
     * @var string
     */
    private $from;

    /**
     * @var string
     */
    private $to;

    /**
     * @var Chunk[]
     */
    private $chunks;

    /**
     * @param Chunk[] $chunks
     */
    public function __construct(string $from, string $to, array $chunks = [])
    {
        $this-&gt;from   = $from;
        $this-&gt;to     = $to;
        $this-&gt;chunks = $chunks;
    }

    public function getFrom(): string
    {
        return $this-&gt;from;
    }

    public function getTo(): string
    {
        return $this-&gt;to;
    }

    /**
     * @return Chunk[]
     */
    public function getChunks(): array
    {
        return $this-&gt;chunks;
    }

    /**
     * @param Chunk[] $chunks
     */
    public function setChunks(array $chunks): void
    {
        $this-&gt;chunks = $chunks;
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>