Composer Autoloading Deep Dive: PSR-4, Classmap, and Files Strategies
Most PHP developers know just enough about Composer autoloading to make it work. But when class resolution fails in a Drupal module, a package publishes duplicate class definitions, or a legacy library throws "class not found" mid-request, you need to understand what the autoloader is actually doing. This article covers all four autoloading strategies, how they interact, and the performance trade-offs that matter in production.