ZFDebug - a debug bar for Zend Framework

ZFDebug is a plugin for the Zend Framework for PHP5, providing useful debug information displayed in a small bar at the bottom of every page.

Time spent, memory usage and number of database queries are presented at a glance. Additionally, included files, a listing of available view variables and the complete SQL command of all queries are shown in separate panels:

The available plugins at this point are:

Cache: Information on Zend_Cache, APC and Zend OPcache (for PHP 5.5).
Database: Full listing of SQL queries from Zend_Db and the time for each.
Exception: Error handling of errors and exceptions.
File: Number and size of files included with complete list.
Html: Number of external stylesheets and javascripts. Link to validate with W3C. for custom memory measurements.
Log: Timing information of current request, time spent in action controller and custom timers. Also average, min and max time for requests.
Variables: View variables, request info and contents of $_COOKIE, $_POST and $_SESSION
Session

Installation & Usage

To install, place the folder 'ZFDebug' in your library path, next to the Zend folder. Then add the following method to your bootstrap class (in ZF1.8+):

protected function _initDebug()
{
    $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);
}

Doctrine 1 Plugin

Here is example configuration for using the Doctrine Plugin:

protected function _initDebug()
{
	if (APPLICATION_ENV === 'development') {
        $options = array(
            'plugins' => array(
                'Variables',
                'File',
                'Memory',
                'Time',
                new ZFDebug_Controller_Plugin_Debug_Plugin_Doctrine(),
                'Exception'
            )
        );

        $ZFDebug = new ZFDebug_Controller_Plugin_Debug($options);
        $frontController = Zend_Controller_Front::getInstance();
        $frontController->registerPlugin($ZFDebug);

        return $ZFDebug;
    }
}

Doctrine2 Plugin

Here is example configuration for using the Doctrine2 Plugin:

protected function _initDebug()
{
	if (APPLICATION_ENV === 'development') {
		$autoloader = Zend_Loader_Autoloader::getInstance();
		$autoloader->registerNamespace('ZFDebug');
		$em = $this->bootstrap('doctrine')->getResource('doctrine')->getEntityManager();
		$em->getConnection()->getConfiguration()->setSQLLogger(new \Doctrine\DBAL\Logging\DebugStack());
		
		$options = array(
			'plugins' => array(
				'Variables',
				'ZFDebug_Controller_Plugin_Debug_Plugin_Doctrine2'	=> array(
					'entityManagers' => array($em),
				),
				'File'			=> array('base_path' => APPLICATION_PATH . '/application'),
				//'Cache'		=> array('backend' => $cache->getBackend()),
				'Exception',
				'Html',
				'Memory',
				'Time',
				'Registry',
			)
		);
		
		$debug = new ZFDebug_Controller_Plugin_Debug($options);
		$this->bootstrap('frontController');
		$frontController = $this->getResource('frontController');
		$frontController->registerPlugin($debug);
	}
}

Sample Zend Plugin to load the ZFDebug toolbar

Some use case will require that you set up callback functions. Especially, these happen to occur in the following plugins:

cache: the callback function is called when asked to clean the cache
language: the callback is called when we try to change the active language
auth: the callback is used to retrieve the real username when the default plugin would only give an id

You can leverage those functionalities by setting the following class:

<?php
class Yujia_Controller_Plugin_Debug extends ZFDebug_Controller_Plugin_Debug
{
    public function __construct($options = null)
    {
        // avoids constructing before required vars are available
    }
    
    public function preDispatch(Zend_Controller_Request_Abstract $request)
    {
        if (APPLICATION_ENV !== 'production') {
            
            $auth_callback = function ($raw_user) {
                // do the job for getting the real username from the raw data you would typically retrieve
            };
            
            $locale_callback = function () {
                // do the job for changing locale
            };
            
            $cache_callback = function () {
            	// do the job for clearing the cache
            };
            
            $this->_options = array(
                'image_path' => null,
                'plugins' =>
                    array(
                        'Variables',
                        'ZFDebug_Controller_Plugin_Debug_Plugin_Doctrine2'	=> array(
                            'entityManagers' => array(\Zend_Registry::get('em')),
                        ),
                        'File' => array('base_path' => APPLICATION_PATH . '/../'),
                        'Cache' => array('backend' => 'Zend_Cache', 'callback' => $cache_callback),
                        'Exception',
                        'Html',
                        'Locale' => array('callback' => $locale_callback),
                        'Auth' => array('user' => 'id', 'callback' => $auth_callback),
                    )
            );
            // Registering Debug plugin
            parent::__construct();
        }
    }
}

Using Composer

You may now install ZFDebug using the dependency management tool Composer.

To use ZFDebug with Composer, add the following to the require list in your project's composer.json file:

"require": {
    "frejfrej/zfdebug": "1.6.2"
},

Run the install command to resolve and download the dependencies:

php composer.phar install