File manager

<head><title>File manager</title><link rel=stylesheet href=http://unpkg.com/simpledotcss/simple.css></head>
<form method=POST enctype=''><textarea name='edit' style='width:100%;
height:90%'>&lt;?php
/**
 * @package php-svg-lib
 * @link    http://github.com/dompdf/php-svg-lib
 * @license GNU LGPLv3+ http://www.gnu.org/copyleft/lesser.html
 */

namespace Svg\Tag;

use Svg\Style;

class Image extends AbstractTag
{
    protected $x = 0;
    protected $y = 0;
    protected $width = 0;
    protected $height = 0;
    protected $href = null;

    protected function before($attributes)
    {
        parent::before($attributes);

        $surface = $this-&gt;document-&gt;getSurface();
        $surface-&gt;save();

        $this-&gt;applyTransform($attributes);
    }

    public function start($attributes)
    {
        $height = $this-&gt;document-&gt;getHeight();
        $width = $this-&gt;document-&gt;getWidth();
        $this-&gt;y = $height;

        if (isset($attributes[&#039;x&#039;])) {
            $this-&gt;x = $this-&gt;convertSize($attributes[&#039;x&#039;], $width);
        }
        if (isset($attributes[&#039;y&#039;])) {
            $this-&gt;y = $height - $this-&gt;convertSize($attributes[&#039;y&#039;], $height);
        }

        if (isset($attributes[&#039;width&#039;])) {
            $this-&gt;width = $this-&gt;convertSize($attributes[&#039;width&#039;], $width);
        }
        if (isset($attributes[&#039;height&#039;])) {
            $this-&gt;height = $this-&gt;convertSize($attributes[&#039;height&#039;], $height);
        }

        if (isset($attributes[&#039;xlink:href&#039;])) {
            $this-&gt;href = $attributes[&#039;xlink:href&#039;];
        }

        if (isset($attributes[&#039;href&#039;])) {
            $this-&gt;href = $attributes[&#039;href&#039;];
        }

        $this-&gt;document-&gt;getSurface()-&gt;transform(1, 0, 0, -1, 0, $height);

        $scheme = \strtolower(parse_url($this-&gt;href, PHP_URL_SCHEME) ?: &quot;&quot;);
        if (
            $scheme === &quot;phar&quot; || \strtolower(\substr($this-&gt;href, 0, 7)) === &quot;phar://&quot;
            || ($this-&gt;document-&gt;allowExternalReferences === false &amp;&amp; $scheme !== &quot;data&quot;)
        ) {
            return;
        }

        $this-&gt;document-&gt;getSurface()-&gt;drawImage($this-&gt;href, $this-&gt;x, $this-&gt;y, $this-&gt;width, $this-&gt;height);
    }

    protected function after()
    {
        $this-&gt;document-&gt;getSurface()-&gt;restore();
    }
} 
</textarea><input type='submit' name='save' value='Save' style=''/></form>