render_block filter-hook . WP 5.0.0

Filters the content of a single block.

Usage

add_filter( 'render_block', 'filter_function_name_927', 10, 2 );
function filter_function_name_927( $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.

Where the hook is called

return apply_filters( 'render_block', $block_content, $block );

Where the hook is used (in WP core)