php-http / message

src/UriFactory/GuzzleUriFactory.php

<?php

namespace Http\Message\UriFactory;

use GuzzleHttp\Psr7;
use Http\Message\UriFactory;

/**
 * Creates Guzzle URI.
 *
 * @author David de Boer <david@ddeboer.nl>
 *
 * @deprecated This will be removed in php-http/message2.0. Consider using the official Guzzle PSR-17 factory
 */
final class GuzzleUriFactory implements UriFactory
{
    /**
     * {@inheritdoc}
     */
    public function createUri($uri)
    {
        return Psr7\uri_for($uri);

The function uri_for was not found. Maybe you did not declare it correctly or list all dependencies?

    }
}