Very handy stuff for dealing with php classes that output direct to stdout rather than returning the data to the calling function, especially if they happen to be inconveniently encoded with the IonCube loader or such, making it impossible to modify them directly without resorting to hex editors.
Also saves having to use mod_rewrite to have the server send everthing through some post-processing type filter script to make modifications, which is good as I already have the site in question proxying itself to get round licence key issues (locked to one machine name only and I am using a themed subdomain hierarchy), would be just starting to get a bit silly 😀
