FirePHP for PHP and AJAX development
FirePHP is a package consisting of a Firefox extension and server-side PHP library for quick PHP development on top of Firebug. It allows you to include the PHP library, and issue logging calls like
fb('Log message' ,FirePHP::LOG);
fb(’Info message’ ,FirePHP::INFO);
fb(’Warn message’ ,FirePHP::WARN);
fb(’Error message’,FirePHP::ERROR);
This is visible only to the Firefox version that has FirePHP installed on top of Firebug. You can also dump entire array and objects to the fb() function call, and have them displayed in Firebug UI.