What Are the Differences Between PSR-0 and PSR-4?

Question

Recently I\'ve read about namespaces and how they are beneficial. I\'m currently creating a project in Laravel and trying to move from class map autoloading to namespacing.

Answer 1

PSR-4 is something like 'relative path', PSR-0, 'absolute path'.

e.g.

config:

'App\Controller' => 'dir/'

PSR-0 autoload:

App\Controller\IndexController --> dir/App/Controller/IndexController.php

PSR-4 autoload:

App\Controller\IndexController --> dir/IndexController.php

And there are some more difference in details between PSR-0 and PSR-4, see here: http://www.php-fig.org/psr/psr-4/