Content Area Block

This block allows you to add an additional block content area to a site-editor template and store the block output inside a meta field. By default, WordPress posts or pages may only store blocks in one place: post_content. These blocks are output on the page using the core/post-content block. This block allows you to have multiple “outlets” where you can add blocks so you can have post-specific blocks appear in more than one location in the template.

The block is a fork of the core/post-content block that uses a customized version of the useEntityBlockEditor hook which supports meta keys. The blocks for your content area are then stored inside that meta key (instead of post_content). This allows you to keep the blocks separate and you can use as many of these on a single template as you want (but in most cases 2 is probably enough). It’s all up to you!

Requirements

1. Using this plugin requires you to enable template previews (which will let you visually see the new content area you’re adding). This can be enabled on any given post or page, but you can optionally set it on by default using a filter.
2. Your theme must be a block theme (i.e. it uses the site editor). This won’t work for a hybrid or classic theme (which has no concept of live template preview in the block editor).

Hooks

If you want to disable this meta key’s registration, add the following to your theme or plugin:

', ']]>', $content ) ), 
    $block_post_id, 
    $attributes, 
    $content, 
    $block 
);