FirePHP – Firefox Extension for PHP Development: This is a really interesting project. It’s a PHP extension that will let you send information along with the response from your PHP script which is only viewable using the awesome Firebug Firefox extension. So it’s like printing debugging stuff to the screen that no one can see but you.
FirePHP allows you to take a deeper look at all the work your PHP code does to generate that page you are currently looking at in your Firefox browser.
Just install the FirePHP Firefox extension, PHP PEAR package and add a few lines of code to your PHP application to get started. You will see a “FirePHP” tab in your Firebug extension to bring your PHP backend logic to your fingertips!
Here’s a screenshot of how it looks.