Flush Rewrite Rules

You learned in the Custom Post Type Basics lab that you need to flush the rewrite rules when registering a custom post type. You need to do it for a custom taxonomy too. Remember, never ever ever do it after you register. Listen to me. It’s too expensive and will slow down your website.

The proper way is to do it when the plugin is activated. In this episode, let’s add our taxonomy registration function to the plugin’s activation handler. Then we’ll deactivate and test. Let me show what it does.

Next, let’s add the handler for when a plugin is uninstalled.