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filter is not described

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

In file: /wp-admin/network/site-users.php
show_network_site_users_add_existing_form
wp-admin/network/site-users.php 211
if ( ! wp_is_large_network( 'users' ) && apply_filters( 'show_network_site_users_add_existing_form', true ) ) {
wp-admin/network/site-users.php 296
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

Usage not found.