Install the debug bar using Composer:

{ "require": { "maximebf/debugbar": "1.*" } }

$ php composer.phar install

The DebugBar has two parts: the main DebugBar object with data collectors and the renderer. Data collectors are objects collecting a specific set of data. To makes things easy, the StandardDebugBar has all the built-in collectors activated.

<?php use DebugBar\StandardDebugBar; $debugbar = new StandardDebugBar(); $debugbarRenderer = $debugbar->getJavascriptRenderer(); $debugbar["messages"]->addMessage("hello world!"); ?> <html> <head> <?php echo $debugbarRenderer->renderHead() ?> </head> <body> ... <?php echo $debugbarRenderer->render() ?> </body> </html>

Try it below!