Introduction to FirePHP
FirePHP is a great tool for debugging PHP, and maintaining some level of control over your error handling. Also, it’s a great tool for getting information about your variables, objects, etc. while your PHP code is executing. FirePHP requires only a small amount of setup and can be reused time and time again without tedious setups for each site on your server. This tutorial/example requires Firefox and Firebug, and FirePHP.