How to use allowed_block_types_all filter in WordPress

Check out these screenshots below. On the left, you’ll see all the available blocks, while on the right, there’s a refined selection achieved by applying this filter.

To use the allowed_block_types_all filter, you need to register it using add_filter. You can place this code in the functions.php file of your active theme or in a custom WordPress Plugin. Here at WePlugins, we always recommend creating a custom WordPress Plugin for using hooks, ensuring that nothing breaks when you update your WordPress Theme in the future.

Live Example 1: Basic Implementation

Here’s a straightforward example of how you can use this hook.

    function weplugins_modify_allowed_block_types_all_defaults($allowed_block_types, $block_editor_context) { 
        return $allowed_block_types; 
    }
    add_filter("allowed_block_types_all", "weplugins_modify_allowed_block_types_all_defaults", 10, 2);
    

Live Example 2: Limiting to Core Paragraph, Heading, and List Blocks

    function weplugins_allowed_block_types($block_editor_context, $editor_context) {
        if (!empty($editor_context->post)) {
            return array(
                'core/paragraph',
                'core/heading',
                'core/list',
            );
        }
        return $block_editor_context;
    }
    add_filter('allowed_block_types_all', 'weplugins_allowed_block_types', 10, 2);
    

Live Example 3: Customizing Block Types Based on User Roles

    function weplugins_customize_blocks_for_user_roles($allowed_blocks) {
        $current_user = wp_get_current_user();
        
        if (in_array('editor', $current_user->roles)) {
            $allowed_blocks[] = 'core/gallery';
        }
        
        return $allowed_blocks;
    }
    add_filter('allowed_block_types_all', 'weplugins_customize_blocks_for_user_roles');
    

And if you need to remove a hook callback, here’s how you can do it:

    remove_filter("allowed_block_types_all", "weplugins_modify_allowed_block_types_all_defaults", 10, 2);
    

Make sure to provide the same callback function name, priority, and number of arguments when removing the hook callback.