Zend framework debug bar is a useful and lightweight plugin. It will make the debugging tasks easier and less painful showing us information like:

• Script running time
• Memory usage
• Variables ($_COOKIE, $_POST and $_SESSION)
• SQL querys
• Included files
• Cache
• Used databases

Installation

Download the ZFDebug plugin. place the folder ‘ZFDebug‘ in your library path, next to the ‘Zend‘ folder. And add the following method to your bootstrap.php file:

protected function _initZFDebug()
{
    $autoloader = Zend_Loader_Autoloader::getInstance();
    $autoloader->registerNamespace('ZFDebug');

    $options = array(
        'plugins' => array('Variables',
                           'Database' => array('adapter' => $db),
                           'File' => array('basePath' => '/path/to/project'),
                           'Cache' => array('backend' => $cache->getBackend()),
                           'Exception')
    );
    $debug = new ZFDebug_Controller_Plugin_Debug($options);

    $this->bootstrap('frontController');
    $frontController = $this->getResource('frontController');
    $frontController->registerPlugin($debug);
}