Dynamic Section Loading - Workflow and Implementation

High-Level Workflow (From User’s Perspective)

Initial Page Load: The first (variabel) ?? sections (or posts) are loaded.
Scroll Event: When the user scrolls down, 'next round of sections' are dynamically loaded.
End of Content: Once all sections have been loaded, the last section will show a message like "End of gallery" and offer the option to "Go to top."

Global Settings (config.php)

$numberOfLoad: Defines how many sections to load per scroll. This keeps the loading process efficient.
$totalRows: Defines how many total posts in db. This can be used global as needed.
$order: Determines the order in which you load the posts (ASC for ascending, DESC for descending, RAND for random). This allows flexibility.

Folder Structure

db.php: Handles database connections and ensures secure inputs.
config.php: Contains global settings like `$numberOfLoad` and `$order`.
index.php: Main front-end file where the gallery is rendered and initial sections are loaded.
loadMoreSections.php: Script that fetches more sections dynamically based on parameters like `after_id`, `limit`, and `order`.

Implementation Outline (Steps)

Initial Load:
- On page load (in `index.php`), fetch the first (variabel) ?? sections from the database.
- Display them using a loop and attach a "scroll to load more" feature that listens for scroll events.
Lazy Load via Scroll:
- On scroll, use JavaScript to detect when the user has reached the bottom of the page.
- Make a fetch request to `loadMoreSections.php` to get the next 3 sections.
Server-Side Fetch (loadMoreSections.php):
- The script receives the `after_id`, `limit`, and `order`.
- A MySQL query fetches the next batch of sections based on these parameters.
- Handle cases like "no more posts to load" by sending an empty response.

Additional Recommendations

Error Handling: Ensure that your code handles errors gracefully on both the server and client sides.

Performance: Consider caching the first few sections or implementing mechanisms to prevent redundant reloads.

Responsive Layout: Test your layout on various screen sizes, as scroll-snap may behave differently on different devices.

Loading State: Show a loading spinner or indicator while new sections are being loaded.

Final Debugging and Logging: Use debug logs in your JavaScript and ensure that your PHP response is in the expected JSON format.

Summary

You have a solid structure with clear goals: dynamic section loading, smooth lazy loading, scroll detection, and end-of-gallery handling. The main challenge will be ensuring the proper handling of the `after_id`, server response, and scroll-snap layout. Keep everything well-documented, especially in your PHP and JavaScript functions, to easily debug issues when they arise.