<form method="POST">
    <h3>Editing: Loader.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (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 PHPUnit\Util\Xml;

use function chdir;
use function dirname;
use function error_reporting;
use function file_get_contents;
use function getcwd;
use function libxml_get_errors;
use function libxml_use_internal_errors;
use function sprintf;
use DOMDocument;

/**
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class Loader
{
    /**
     * @throws Exception
     */
    public function loadFile(string $filename, bool $isHtml = false, bool $xinclude = false, bool $strict = false): DOMDocument
    {
        $reporting = error_reporting(0);
        $contents  = file_get_contents($filename);

        error_reporting($reporting);

        if ($contents === false) {
            throw new Exception(
                sprintf(
                    'Could not read &quot;%s&quot;.',
                    $filename,
                ),
            );
        }

        return $this-&gt;load($contents, $isHtml, $filename, $xinclude, $strict);
    }

    /**
     * @throws Exception
     */
    public function load(string $actual, bool $isHtml = false, string $filename = '', bool $xinclude = false, bool $strict = false): DOMDocument
    {
        if ($actual === '') {
            throw new Exception('Could not load XML from empty string');
        }

        // Required for XInclude on Windows.
        if ($xinclude) {
            $cwd = getcwd();
            @chdir(dirname($filename));
        }

        $document                     = new DOMDocument;
        $document-&gt;preserveWhiteSpace = false;

        $internal  = libxml_use_internal_errors(true);
        $message   = '';
        $reporting = error_reporting(0);

        if ($filename !== '') {
            // Required for XInclude
            $document-&gt;documentURI = $filename;
        }

        if ($isHtml) {
            $loaded = $document-&gt;loadHTML($actual);
        } else {
            $loaded = $document-&gt;loadXML($actual);
        }

        if (!$isHtml &amp;&amp; $xinclude) {
            $document-&gt;xinclude();
        }

        foreach (libxml_get_errors() as $error) {
            $message .= &quot;\n&quot; . $error-&gt;message;
        }

        libxml_use_internal_errors($internal);
        error_reporting($reporting);

        if (isset($cwd)) {
            @chdir($cwd);
        }

        if ($loaded === false || ($strict &amp;&amp; $message !== '')) {
            if ($filename !== '') {
                throw new Exception(
                    sprintf(
                        'Could not load &quot;%s&quot;.%s',
                        $filename,
                        $message !== '' ? &quot;\n&quot; . $message : '',
                    ),
                );
            }

            if ($message === '') {
                $message = 'Could not load XML for unknown reason';
            }

            throw new Exception($message);
        }

        return $document;
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>