What?

Updates the block registration documentation to cover the newer, more efficient registration APIs introduced in WordPress 6.7 and 6.8.

Why?

The current docs only describe register_block_type() for server-side block registration. WordPress 6.7 introduced wp_register_block_metadata_collection() and
WordPress 6.8 introduced wp_register_block_types_from_metadata_collection() — which is now the recommended approach and what @wordpress/create-block scaffolds by
default. The docs should reflect this.

• https://make.wordpress.org/core/2025/03/13/more-efficient-block-type-registration-in-6-8/
• https://make.wordpress.org/core/2024/10/17/new-block-type-registration-apis-to-improve-performance-in-wordpress-6-7/

How?

registration-of-a-block.md:

• Restructured the "Registering a block with PHP" section into three subsections covering each approach in order of recommendation:
  1. wp_register_block_types_from_metadata_collection() (recommended, WP 6.8+)
  2. wp_register_block_metadata_collection() + individual register_block_type() (WP 6.7+)
  3. register_block_type() (single blocks or older WP versions)
• Added callout boxes with version requirements and links to dev notes
• Updated the Additional resources section with links to the new functions and dev notes

file-structure-of-a-block.md:

• Updated the <plugin-file>.php section to mention wp_register_block_types_from_metadata_collection() as the recommended approach, with a cross-link to the full
  registration docs