Grav\Plugin\Admin\AdminController::taskCopy PHP Method

    protected function taskCopy()
    {
        if (!$this->authorizeTask('copy page', ['admin.pages', 'admin.super'])) {
            return false;
        }
        // Only applies to pages.
        if ($this->view != 'pages') {
            return false;
        }
        try {
            /** @var Pages $pages */
            $pages = $this->grav['pages'];
            // Get the current page.
            $original_page = $this->admin->page(true);
            // Find new parent page in order to build the path.
            $parent = $original_page->parent() ?: $pages->root();
            // Make a copy of the current page and fill the updated information into it.
            $page = $original_page->copy($parent);
            $order = 0;
            if ($page->order()) {
                $order = $this->getNextOrderInFolder($page->parent()->path());
            }
            $this->preparePage($page);
            // Make sure the header is loaded in case content was set through raw() (expert mode)
            $page->header();
            if ($page->order()) {
                $page->order($order);
            }
            $folder = $this->findFirstAvailable('folder', $page);
            $slug = $this->findFirstAvailable('slug', $page);
            $page->path($page->parent()->path() . DS . $page->order() . $folder);
            $page->route($page->parent()->route() . '/' . $slug);
            $page->rawRoute($page->parent()->rawRoute() . '/' . $slug);
            // Append progressive number to the copied page title
            $match = preg_split('/(\\d+)(?!.*\\d)/', $original_page->title(), 2, PREG_SPLIT_DELIM_CAPTURE);
            $header = $page->header();
            if (!isset($match[1])) {
                $header->title = $match[0] . ' 2';
            } else {
                $header->title = $match[0] . ((int) $match[1] + 1);
            }
            $page->header($header);
            $page->save(false);
            $redirect = $this->view . $page->rawRoute();
            $header = $page->header();
            if (isset($header->slug)) {
                $match = preg_split('/-(\\d+)$/', $header->slug, 2, PREG_SPLIT_DELIM_CAPTURE);
                $header->slug = $match[0] . '-' . (isset($match[1]) ? (int) $match[1] + 1 : 2);
            }
            $page->header($header);
            $page->save();
            $this->grav->fireEvent('onAdminAfterSave', new Event(['page' => $page]));
            // Enqueue message and redirect to new location.
            $this->admin->setMessage($this->admin->translate('PLUGIN_ADMIN.SUCCESSFULLY_COPIED'), 'info');
            $this->setRedirect($redirect);
        } catch (\Exception $e) {
            throw new \RuntimeException('Copying page failed on error: ' . $e->getMessage());
        }
        return true;
    }