Zend Framework has functionality to send messages to the Firebug console (via Firefox’s FirePHP addon), but if you’re not using the ZF front controller, the API is a bit of a pain. Besides your instance of Zend_Log, you must keep track of a few additional objects just to manually flush the headers after all your logging calls. Since I knew the old FirePHP class didn’t need this follow-up step, I figured I could just flush the headers after each send.
The result is FireLog. On the FireLog instance, calls to methods like log(), info(), warn(), etc. are proxied to an internal Zend_Log instance, while the methods send(), group(), and groupEnd() are proxied to the static methods on Zend_Wildfire_Plugin_FirePhp. In both cases the headers are set immediately using some simple ZF subclassing.