wp_insert_post_empty_content хук-фильтр . WP 3.3.0

Filters whether the post should be considered "empty".

The post is considered "empty" if both:

1. The post type supports the title, editor, and excerpt fields
2. The title, editor, and excerpt fields are all empty

Returning a truthy value to the filter will effectively short-circuit the new post being inserted, returning 0. If $wp_error is true, a WP_Error will be returned instead.

Использование

add_filter( 'wp_insert_post_empty_content', 'filter_function_name_3435', 10, 2 );
function filter_function_name_3435( $maybe_empty, $postarr ){
	// filter...

	return $maybe_empty;
}

$maybe_empty(true/false)

Whether the post should be considered "empty".

$postarr(массив)

Array of post data.

Где вызывается хук

if ( apply_filters( 'wp_insert_post_empty_content', $maybe_empty, $postarr ) ) {

Где используется хук (в ядре WP)

add_filter( 'wp_insert_post_empty_content', '__return_false', 1000 );

remove_filter( 'wp_insert_post_empty_content', '__return_false', 1000 );