What are the potential pitfalls when installing composer and guzzle in different directories?

When installing Composer and Guzzle in different directories, one potential pitfall is that Guzzle may not be able to autoload its classes properly if the autoload file generated by Composer is located in a different directory. To solve this issue, you can specify the path to the Composer autoload file in your Guzzle client instantiation to ensure that Guzzle can autoload its classes correctly.

require '/path/to/vendor/autoload.php';

use GuzzleHttp\Client;

$client = new Client([
    'base_uri' => 'http://example.com',
    'timeout' => 2.0,
]);