What are the best practices for managing namespaces and autoload in PHP projects with Composer?

When managing namespaces and autoload in PHP projects with Composer, it is best practice to follow PSR-4 autoloading standards. This involves setting up a "autoload" section in the composer.json file to define the namespace and directory structure for autoloading classes. By adhering to these standards, you can ensure that your classes are autoloaded correctly without the need for manual inclusion.

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