Post revisions, autosave, and trash handling

The Trash feature in WordPress gives you a safeguard against permanently
deleting posts by mistake. In Book IV, you find that you can send a post or a
page to the trash and that this action doesn’t permanently delete it; instead,
WordPress stores it in a virtual trash can. (Windows users can think of it
as the Recycle Bin.) You can visit the trash can any time and permanently

delete the post or page, or you can leave it there and WordPress automati-

cally empties the trash can every 30 days. If you want to adjust this time
interval, you can add the first line of code to force WordPress to empty the
trash weekly, or the second line to disable the trash feature, completely, as
follows (on its own line):

define(‘EMPTY_TRASH_DAYS’, 7); // empty trash weekly

define(‘EMPTY_TRASH_DAYS’, 0); // disable trash