While I was experimenting with my developing plugin and after hooking
the_content_feed to modify the default WordPress feed output, which can be accessed at
http://siteurl/?feed=rss2, even if I comment out the line,
add_filter('the_content_feed', 'myfunc') the feed output is still modified. I mean I've already succeeded to modify the output; I want to return back to the normal.
I suspected it's due to the cache and tried to clear it. As I search the web, I found this article and tried the following code,
global $wpbd; $wpdb->query( "DELETE FROM `wp_options` WHERE `option_name` LIKE ('_transient%_feed_%')" );
However, the feed output is still modified. I have no ideas at this point. Could somebody help?