WordPress at a glance
filter is not described

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

wp_cache_get_response_headers()
wpsc_known_headers
wp-super-cache/wp-cache-phase2.php 1579
$known_headers = apply_filters( 'wpsc_known_headers', $known_headers );

Where in WP core the hook is used WP Super Cache

Usage not found.