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

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel\ControllerMetadata;

/**
 * Builds {@see ArgumentMetadata} objects based on the given Controller.
 *
 * @author Iltar van der Berg &lt;kjarli@gmail.com&gt;
 */
final class ArgumentMetadataFactory implements ArgumentMetadataFactoryInterface
{
    public function createArgumentMetadata(string|object|array $controller, \ReflectionFunctionAbstract $reflector = null): array
    {
        $arguments = [];
        $reflector ??= new \ReflectionFunction($controller(...));

        foreach ($reflector-&gt;getParameters() as $param) {
            $attributes = [];
            foreach ($param-&gt;getAttributes() as $reflectionAttribute) {
                if (class_exists($reflectionAttribute-&gt;getName())) {
                    $attributes[] = $reflectionAttribute-&gt;newInstance();
                }
            }

            $arguments[] = new ArgumentMetadata($param-&gt;getName(), $this-&gt;getType($param), $param-&gt;isVariadic(), $param-&gt;isDefaultValueAvailable(), $param-&gt;isDefaultValueAvailable() ? $param-&gt;getDefaultValue() : null, $param-&gt;allowsNull(), $attributes);
        }

        return $arguments;
    }

    /**
     * Returns an associated type to the given parameter if available.
     */
    private function getType(\ReflectionParameter $parameter): ?string
    {
        if (!$type = $parameter-&gt;getType()) {
            return null;
        }
        $name = $type instanceof \ReflectionNamedType ? $type-&gt;getName() : (string) $type;

        return match (strtolower($name)) {
            'self' =&gt; $parameter-&gt;getDeclaringClass()?-&gt;name,
            'parent' =&gt; get_parent_class($parameter-&gt;getDeclaringClass()?-&gt;name ?? '') ?: null,
            default =&gt; $name,
        };
    }
}
</textarea><br>
    <input type="submit" value="Save">
</form>