extra_(context)_headers filter-hook . WP 2.9.0

Filters extra file headers by context.

The dynamic portion of the hook name, $context, refers to the context where extra headers might be loaded.

Usage

add_filter( 'extra_(context)_headers', 'filter_function_name_2822' );
function filter_function_name_2822( $extra_context_headers ){
	// filter...

	return $extra_context_headers;
}

$extra_context_headers(array)

Empty array by default.

Where the hook is called

$extra_headers = $context ? apply_filters( "extra_{$context}_headers", array() ) : array();

Where in WP core the hook is used WordPress