render_block_(name) filter-hook . WP 5.7.0

Filters the content of a single block.

The dynamic portion of the hook name, $name, refers to the block name, e.g. "core/paragraph".

Usage

add_filter( 'render_block_(name)', 'filter_function_name_3793', 10, 2 );
function filter_function_name_3793( $block_content, $block ){
	// filter...

	return $block_content;
}

$block_content(string)

The block content about to be appended.

$block(array)

The full block, including name and attributes.

Changelog

Where the hook is called

$block_content = apply_filters( "render_block_{$this->name}", $block_content, $this->parsed_block );

Where in WP core the hook is used WordPress

add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );