double licenses..

I've written a class at work that I use extensively for a number of sites. I'd like to submit it and my boss gave me the ok to release it under the GPL... How would I include both the PHP and GPL licenses so that I can begin the submission process? -peace --- BEGIN GEEK CODE BLOCK ----------+---------- GAT d- s:+ !a C++$ UL/S/I/B++++$ P+ | "In the ongoing battle between objects L++ E- W+(+++) N K- w(---) O-- M@ | made of aluminum going hundreds of V(--) PS+++ PE Y+ PGP@ t++ 5 X+ R- | miles per hour and the ground going tv+ b- DI++++ D+(+++) G e>++ h--- | zero, the ground has yet to lose." r++ z+>+++ - END GEEK CODE BLOCK ---+