How to Trigger Cloning from Custom Code or Another Plugin

Version 4.4.1 and above

Use the introduced function ns_cloner_perform_clone that is only available from version 4.4.1 and above. Parameters are passed to the function as an array. For example:

ns_cloner_perform_clone( array(
	'source_id'    => 1,
	'target_name'  => 'sample-target',
	'target_title' => 'Sample Target Title',
) );

The function returns a response of WP_Error or an array when successful with a message. Sample cloning:

function my_custom_plugin_maybe_clone( $source_id, $target_name, $target_title, $user_id ) {
    if ( ! function_exists( 'ns_cloner_perform_clone' ) ) {
        return [
			'success' => false,
			'message' => 'Cloner needs to be active';
		];
    }
	$response = ns_cloner_perform_clone( array(
		'source_id'    => $source_id,
		'target_name'  => $target_name,
		'target_title' => $target_title,
		'user_id'      => $user_id,
	) );
	
	if ( is_wp_error( $response ) ) {
		return [
			'success' => false,
			'message' => $response->get_error_message();
		];
	}
	
	return [
        'success' => true,
        'message' => $response['message']
    ];
}

Other cloning methods:

$array_of_post_types = array(
	'attachment',
	'page',
	'post',
	'product',
	'revision',
	'wp_global_styles',
);
$array_of_tables = array(
	'wp_commentmeta',
	'wp_comments',
	'wp_links',
	'wp_options',
	'wp_postmeta',
	'wp_posts',
	'wp_term_relationships',
	'wp_term_taxonomy',
	'wp_termmeta',
	'wp_terms',
);

/**
 * Set up the cloning request.
 * These are the same fields that get submitted via an AJAX request when cloning via the
 * admin interface, so you can inspect that request to determine other ways to configure
 * the parameters, particularly if you're using NS Cloner Pro and want to use another
 * clone mode (like clone-over or teleport / remote cloning)
 */
 $request = array(
    'clone_mode'           => 'core',
    'source_id'            => 1, // any blog/site id on network
    'user_id'              => 1, // Optional user id to assign to the site
    'target_name'          => 'subdomain-or-subdir',
    'target_title'         => 'New Site Title',
    'tables_to_clone'      => $array_of_tables,
    'do_copy_posts'        => 1,
     'post_types_to_clone' => $array_of_post_types, // can customize post types . . .
    'debug'                => 1,
    'clone_nonce'          => wp_create_nonce( 'ns_cloner' ),
 );


// This is required to bootstrap the required plugin classes.
ns_cloner()->init();

foreach ( $request as $key => $value ) {
	ns_cloner_request()->set( $key, $value );
}
ns_cloner_request()->set_up_vars();
ns_cloner_request()->save();
// Run init to begin. This will run in the background
ns_cloner()->process_manager->init();

Trigger from plugins

Gravity Forms

add_action( 'gform_after_submission', 'create_custom_site_after_submission', 10, 2 );
function create_custom_site_after_submission( $entry, $form ) {
 
    if ( ! function_exists( 'ns_cloner_perform_clone' ) ) {
        return;
    }
	
	$target_name = rgar( $entry, '1' ); // Change with your id.
	$target_title = rgar( $entry, '2' ); // Change with your id.
	$response = ns_cloner_perform_clone( array(
		'source_id'    => 1,
		'target_name'  => $target_name,
		'target_title' => $target_title,
	) );
	
	if ( ! is_wp_error( $response ) ) {
		GFCommon::log_debug( 'cloner_site_error: result => ' . $response->get_error_message() );
	}
	
	GFCommon::log_debug( 'cloner_site_success: result => ' . print_r( $response, true ) );
}