How to count posts in tags within time limit

WP Core doesn’t have a way to pull tags by how many posts were published associated to a tag in a given time period. You’ll need to roll your own solution. Use $wpdb->prepare as a best practice; the Codex article on the wpdb class should give you the info you need to run the query … Read more

Multiple posts in one page

What you are describing is called infinite post scrolling with URL change. The demo you linked to is using AJAX to accomplish that. I have never used infinite post scrolling before – so I can’t tell if the website you linked to wrote their own code or used a plugin. But since you asked specifically … Read more