<form method="POST">
    <h3>Editing: ValidationResult.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 sprintf;
use function trim;

/**
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 *
 * @psalm-immutable
 */
final class ValidationResult
{
    /**
     * @psalm-var array&lt;int,list&lt;string&gt;&gt;
     */
    private $validationErrors = [];

    /**
     * @psalm-param array&lt;int,\LibXMLError&gt; $errors
     */
    public static function fromArray(array $errors): self
    {
        $validationErrors = [];

        foreach ($errors as $error) {
            if (!isset($validationErrors[$error-&gt;line])) {
                $validationErrors[$error-&gt;line] = [];
            }

            $validationErrors[$error-&gt;line][] = trim($error-&gt;message);
        }

        return new self($validationErrors);
    }

    private function __construct(array $validationErrors)
    {
        $this-&gt;validationErrors = $validationErrors;
    }

    public function hasValidationErrors(): bool
    {
        return !empty($this-&gt;validationErrors);
    }

    public function asString(): string
    {
        $buffer = '';

        foreach ($this-&gt;validationErrors as $line =&gt; $validationErrorsOnLine) {
            $buffer .= sprintf(PHP_EOL . '  Line %d:' . PHP_EOL, $line);

            foreach ($validationErrorsOnLine as $validationError) {
                $buffer .= sprintf('  - %s' . PHP_EOL, $validationError);
            }
        }

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