wpseo_image_sizes хук-фильтр . Yoast 1.0

Filter: 'wpseo_image_sizes' - Determines which image sizes we'll loop through to get an appropriate image.

Использование

add_filter( 'wpseo_image_sizes', 'filter_function_name_6087', 10, 2 );
function filter_function_name_6087( $[ full, $string ){
	// filter...

	return $[ full;
}

$[ full(массив)

The array of image sizes to loop through.

$string

-

Где вызывается хук

return apply_filters( 'wpseo_image_sizes', [ 'full', 'large', 'medium_large' ] );

Где используется хук в ядре Yoast SEO