paragraph generator - create from random sentences

I need a simple job doing in PHP... i want to create random paragraphs from lists of sentences in text files. Database would be faster, but i need this done with text files. I want to open one text file, grab a sentence from the list and close the file. Then open another text file, grab 1 or 2 sentences and then open another text file and grab one more sentence. I then want to write this to the screen so that the user can copy and paste. This is it really :-) I need it to be done asap and will pay $40 for a fast resolution.