Websites created with the Weebly Website Builder have to be self-hosted.
When you publish a site, Weebly will FTP (our systems sets the FTP publishing credentials automatically) some static files (index.html), proxy files (a few PHP files), and .htaccess to the location you've specified for that site.
The PHP file is pretty small and acts as a proxy.
The first request to the published site is responded to by the PHP file (via the 404 handlers specified in .htaccess).
The PHP file makes a call to Weebly for the contents of the page, then the contents are then returned to the user's browser.
While this is happening under the hood, the PHP file caches the content for each subsequent request to avoid future trips to Weebly for the contents.
Upon the next publish of the site the cache is cleared and the process starts again.
