I am looking to implement the framework amphp/thread, with Symfony3, which I ve read about in this article (https://www.mullie.eu/parallel-processing-multi-tasking-php/).
I'd looked at the setting process on the git page: https://github.com/amphp/thread.
I've followed the checklist:
You can simply install the library with composer, as example launching this command from the root of your project:
>php composer.phar require amphp/thread
And use it in your code directly: the composer process generate the correct autoloader for you. No necessary add to the list of the Symfony2 bundle (is not a bundle).
Hope this help