is_network_only_plugin()WP 3.0.0

Checks for "Network: true" in the plugin header to see if this should be activated only as a network wide plugin. The plugin would also work when Multisite is not enabled.

Checks for "Site Wide Only: true" for backward compatibility.

No Hooks.


true|false. True if plugin is network only, false otherwise.


is_network_only_plugin( $plugin );
$plugin(string) (required)
Path to the plugin file relative to the plugins directory.


Since 3.0.0 Introduced.

is_network_only_plugin() code WP 6.1.1

function is_network_only_plugin( $plugin ) {
	$plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin );
	if ( $plugin_data ) {
		return $plugin_data['Network'];
	return false;