Using PHP includes is a perfectly viable method for coding an HTML site, especially if you are aiming to implement reusable components like headers, footers, or navigation menus across multiple pages. PHP includes can help in maintaining consistency and reducing redundancy by allowing you to make changes to a single file, which will then be reflected across all the pages that utilize the include. This approach can enhance the maintainability and organization of your codebase.

While PHP includes are still widely used in numerous projects, it’s important to assess the specific needs and scale of your website. If you’re working on a smaller site or prefer a lightweight approach, PHP includes can serve you well. However, for larger, more complex sites, you might want to consider using more advanced frameworks or content management systems (CMS) that provide more robust features for templating, routing, and data handling.

Additionally, modern front-end development often employs JavaScript frameworks and tools that may offer different mechanisms for including reusable components, thus complementing or even replacing server-side includes like those in PHP. Whichever approach you choose, ensure it aligns with your project requirements, development skills, and the resources available to you.