show_network_site_users_add_existing_form filter-hook . WP 3.1.0

Filters whether to show the Add Existing User form on the Multisite Users screen.

Usage

add_filter( 'show_network_site_users_add_existing_form', 'filter_function_name_4920' );
function filter_function_name_4920( $bool ){
	// filter...

	return $bool;
}

$bool(true|false)

Whether to show the Add Existing User form.
Default: true

Where the hook is called

if ( ! wp_is_large_network( 'users' ) && apply_filters( 'show_network_site_users_add_existing_form', true ) ) {

if ( current_user_can( 'promote_users' ) && apply_filters( 'show_network_site_users_add_existing_form', true ) ) :

Where in WP core the hook is used WordPress