pre_render_block filter-hook . WP 5.1.0

Allows render_block() to be shortcircuited, by returning a non-null value.

Usage

add_filter( 'pre_render_block', 'filter_function_name_8394', 10, 2 );
function filter_function_name_8394( $pre_render, $block ){
	// filter...

	return $pre_render;
}

$pre_render(string/null)

The pre-rendered content.
Default: null

$block(array)

The block being rendered.

Changelog

Where the hook is called

$pre_render = apply_filters( 'pre_render_block', null, $block );

Where in WP core the hook is used