How do I autoload classes in PHP (Composer PSR-4)?

Autoloading classes in PHP using Composer's PSR-4 standard makes it easier to manage class files without needing to manually include them everywhere. Here’s how to set it up:


    {
        "autoload": {
            "psr-4": {
                "Namespace\\": "src/"
            }
        }
    }

In this example, any class in the "src/" directory that belongs to the "Namespace" will be autoloaded automatically. You can run composer dump-autoload to regenerate the autoload files whenever you add new classes.