uninvention wrote in php

importing pdf's

i'm pretty sure i know the answer here ("nope"), but i'd figure i'd ask anyway for confirmation:

i'm using php to create a pdf document that spans several pages. i want the last page to be comprised of an existing pdf document. i don't want to edit the existing document or do anything fancy to it. i just want to tack it on to the end of the pdf i'm creating. is there anyway to accomplish this without using extremely expensive commercial libraries?