Custom Post types not working

Hi @goldfinch44.

First off, you never want to directly edit a plugin, theme, or core WordPress file. Any changes you make will be lost when you update the plugin/theme/WordPress.

This is what filters and actions are for. You can safely add support for additional post types in this plugin using the fpw_post_types filter (referenced in the FAQ). You can see examples of how to use that in this gist.

The code you write should go in your theme’s functions.php file or a custom plugin for your site.

It sounds like that should be working, so I’m not quite sure what to tell you. I’d double-check that “book” is the actual slug of your custom post type. For example if you go to the “All Books” page of your admin, it’ll be at a URL like this:

https://example.com/wp-admin/edit.php?post_type=xyz_books

In that case, “xyz_books” is the value the filter will need. I wouldn’t recommend a PHP execution plugin. If you want to try something else, try an mu-plugin.

For posterity, can you post your solution to help other people?

You can’t declare the same function name twice. Instead, you just need to add a second post type to the $post_types array:

<?php
add_filter( 'fpw_post_types', 'fpw_add_post_type_to_feature' );
function fpw_add_post_type_to_feature( $post_types ) {
	$post_types[] = 'book';
	$post_types[] = 'another_post_type'; /* ADD THIS LINE */
	return $post_types;
}
?>

Glad I could help 🙂