WordPress at a glance
function is not described

WP_Theme::network_enable_theme() public WP 4.6.0

Enables a theme for all sites on the current network.

{} It's a method of the class: WP_Theme{}

No Hooks.

Return

Null. Nothing.

Usage

$result = WP_Theme::network_enable_theme( $stylesheets );
$stylesheets(string/string[]) (required)
Stylesheet name or array of stylesheet names.

Changelog

Since 4.6.0 Introduced.

Code of WP_Theme::network_enable_theme() WP 5.5.1

<?php
public static function network_enable_theme( $stylesheets ) {
	if ( ! is_multisite() ) {
		return;
	}

	if ( ! is_array( $stylesheets ) ) {
		$stylesheets = array( $stylesheets );
	}

	$allowed_themes = get_site_option( 'allowedthemes' );
	foreach ( $stylesheets as $stylesheet ) {
		$allowed_themes[ $stylesheet ] = true;
	}

	update_site_option( 'allowedthemes', $allowed_themes );
}