public function flushUpdatedFiles()
 {
     asort($this->updated_files);
     $html = "<p>{$this->lang->line('progress_modified_files')}</p><div id=\"updatedFiles\" style=\"width:70%;display: none;\">";
     if (!empty($this->updated_files['failed'])) {
         $html .= sprintf($this->lang->line('text_files_failed'), count($this->updated_files['failed'])) . '<br />';
         $html .= '<textarea class="form-control" readonly>' . implode(PHP_EOL, $this->updated_files['failed']) . '</textarea><br />';
     }
     if (!empty($this->updated_files['added'])) {
         $html .= sprintf($this->lang->line('text_files_added'), count($this->updated_files['added'])) . '<br />';
         $html .= '<textarea class="form-control" readonly>' . implode(PHP_EOL, $this->updated_files['added']) . '</textarea><br>';
     }
     if (!empty($this->updated_files['modified'])) {
         $html .= sprintf($this->lang->line('text_files_modified'), count($this->updated_files['modified'])) . '<br />';
         $html .= '<textarea class="form-control" readonly>' . implode(PHP_EOL, $this->updated_files['modified']) . '</textarea><br>';
     }
     if (!empty($this->updated_files['unchanged'])) {
         $html .= sprintf($this->lang->line('text_files_unchanged'), count($this->updated_files['unchanged'])) . '<br />';
         $html .= '<textarea class="form-control" readonly>' . implode(PHP_EOL, $this->updated_files['unchanged']) . '</textarea><br>';
     }
     $html .= '</div><script type="text/javascript">jQuery(\'#toggleUpdatedFiles\').on(\'click\', function () { jQuery(\'#updatedFiles\').slideToggle(); });</script>';
     $html .= '<p>' . sprintf($this->lang->line('progress_update_success'), 'TastyIgniter') . '</p>';
     flush_output($html, FALSE);
 }
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    public function upgrade()
    {
        $this->output->enable_profiler(FALSE);
        if (!extension_loaded('zip')) {
            $this->alert->set('warning', $this->lang->line('alert_zip_warning'));
            redirect('updates');
        }
        if (!$this->uri->rsegment(3)) {
            $this->alert->set('warning', $this->lang->line('alert_bad_request'));
            redirect('updates');
        } else {
            if (!$this->user->hasPermission('Site.Updates.Add')) {
                $this->alert->set('warning', $this->lang->line('alert_permission_warning'));
                redirect('updates');
            }
        }
        $update_type = $this->uri->rsegment(3);
        $this->setHTMLHead();
        set_time_limit(300);
        // 5 minutes
        if (function_exists('apache_setenv')) {
            @apache_setenv('no-gzip', 1);
        }
        @ini_set('zlib.output_compression', 0);
        @ini_set('implicit_flush', 1);
        ob_implicit_flush(TRUE);
        ignore_user_abort(TRUE);
        if (ob_get_level() == 0) {
            ob_start();
        }
        flush_output($this->load->view($this->config->item('admin', 'default_themes') . 'updates_upgrade', '', TRUE), FALSE);
        if ($update_type === 'core') {
            // Enable maintenance mode, will be disabled after update
            flush_output($this->lang->line('progress_enable_maintenance') . "<br />");
            $maintenance_mode = $this->config->item('maintenance_mode');
            $this->config->set_item('maintenance_mode', 0);
            $this->Updates_model->update($update_type);
            // Restore maintenance mode
            flush_output($this->lang->line('progress_disable_maintenance'));
            $this->config->set_item('maintenance_mode', $maintenance_mode);
            flush_output(sprintf($this->lang->line('text_complete_installation'), base_url()));
        } else {
            if ($updates = $this->input->get('updates')) {
                foreach ($updates as $update) {
                    $update = explode('|', $update);
                    if (count($update) === 2) {
                        $this->Updates_model->update($update_type, $update[0], $update[1]);
                    }
                }
            }
        }
        flush_output('<script type="text/javascript">
			parent.jQuery(\'#updateProgress\').attr(\'class\', \'fa fa-check\')
			.attr(\'title\', \'Complete\');
		</script>', FALSE);
        flush_output('</body></html>', FALSE);
        ob_end_flush();
    }