get_the_categories filter-hook . WP 3.1.0

Filters the array of categories to return for a post.

Usage

add_filter( 'get_the_categories', 'filter_function_name_1723', 10, 2 );
function filter_function_name_1723( $categories, $id ){
	// filter...

	return $categories;
}

$categories(WP_Term[])

An array of categories to return for the post.

$id(int/false)

ID of the post.

Changelog

Where the hook is called

return apply_filters( 'get_the_categories', $categories, $id );

Where in WP core the hook is used