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Theme Napkin Wordpress Plugin - Safeguard unintended output generated by theme bootstrap code (functions.php).
* Theme Napkin Wordpress Plugin
* Safeguard unintended output generated by theme bootstrap code (functions.php).
* Copyright 2011 by hakre <http::/>, some rights reserved.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* Wordpress Plugin Header:
* Plugin Name: Theme Napkin
* Plugin URI:
* Version: 0.1
* Author: hakre
* Author URI:
* Description: Some themes leak, Safeguard Theme Output puts a napkin around them. In case WP_DEBUG is on, you can use it to debug your environment for theme leaking issues.
* Tags: Output, Theme, function.php, #16485
* Min WP Version: 3.0
* Requires at least: 3.0
* Tested up to: 3.1-RC4
* Stable tag: 0.1
return themeNapkinPlugin::bootstrap();
class themeNapkinPlugin {
/** @var int */
private $outputLength = 0;
/** @var safeguardThemeOutputPlugin */
static $instance;
static function bootstrap() {
if (null === self::$instance)
self::$instance = new self();
return self::$instance;
public function count() {
return $this->outputLength;
public function __construct() {
foreach(array('setup_theme', 'after_setup_theme') as $hook)
add_filter($hook, array($this, $hook));
public function setup_theme() {
public function after_setup_theme() {
$buffer = ob_get_clean();
$this->outputLength = strlen($buffer);
if (strlen($buffer) && WP_DEBUG && apply_filters('leaking_theme_trigger_error', true, $buffer)) {
trigger_error( __('The theme\'s functions.php generated unexpected output.'));
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