WordPress at a glance
filter is not described

home_url filter-hook . WP 3.0.0

Filters the home URL.

Usage

add_filter( 'home_url', 'filter_function_name_1861', 10, 4 );
function filter_function_name_1861( $url, $path, $orig_scheme, $blog_id ){
	// filter...

	return $url;
}
$url(string)
The complete home URL including scheme and path.
$path(string)
Path relative to the home URL. Blank string if no path is specified.
$orig_scheme(string/null)
Scheme to give the home URL context. Accepts 'http', 'https', 'relative', 'rest', or null.
$blog_id(int/null)
Site ID, or null for the current site.

Where the hook is called

get_home_url()
wp-includes/link-template.php 2973
return apply_filters( 'home_url', $url, $path, $orig_scheme, $blog_id );

Where the hook is used (in WP core)

Does not used.