allowed_block_types filter-hook . WP 5.0.0

Filters the allowed block types for the editor, defaulting to true (all block types supported).

Usage

add_filter( 'allowed_block_types', 'filter_function_name_3220', 10, 2 );
function filter_function_name_3220( $allowed_block_types, $post ){
	// filter...

	return $allowed_block_types;
}

$allowed_block_types(true/false/array)

Array of block type slugs, or boolean to enable/disable all.

$post(object)

The post resource data.

Where the hook is called

$allowed_block_types = apply_filters( 'allowed_block_types', true, $post );

Where the hook is used (in WP core)