wpsc_known_headers filter-hook . WPSCache 1.0

Usage

add_filter( 'wpsc_known_headers', 'filter_function_name_3566' );
function filter_function_name_3566( $known_headers ){
	// filter...

	return $known_headers;
}

$known_headers

-

Where the hook is called

$known_headers = apply_filters( 'wpsc_known_headers', $known_headers );

Where in WP core the hook is used WP Super Cache