WordPress at a glance
filter is not described

network_site_url filter-hook . WP 3.0.0

Filters the network site URL.


add_filter( 'network_site_url', 'filter_function_name_3977', 10, 3 );
function filter_function_name_3977( $url, $path, $scheme ){
	// filter...

	return $url;
The complete network site URL including scheme and path.
Path relative to the network site URL. Blank string if no path is specified.
Scheme to give the URL context. Accepts 'http', 'https', 'relative' or null.


Since 3.0.0 Introduced.

Where the hook is called

wp-includes/link-template.php 3502
return apply_filters( 'network_site_url', $url, $path, $scheme );

Where in WP core the hook is used WordPress

Usage not found.