ThirdParty Libraries usage

Being Symfony, I imagine it's all available through Composer, so just do it all through Composer. Don't worry about using the third party directory at all.

So:

1. add it as a requirement to your composer.json
2. composer update to install it
3. load the class like any other autoloaded class:

Code:

$yaml = new Parser();

That should do it.

Support Development •  CodeIgniter 4 Foundations • Practical CodeIgniter 3  • CodeIgniter Tutorials