google PR checking script

We want to build a php script which will be able to take input url from text files (.txt) or from a text box(This box can take 1000 + urls at a time)and show their google page rank (PR) on screen and have option to import those urls/pr set to a seperate excel file. Payment will be sent via paypal afeter work is being completed. I guess it's very simple and would take only 1 day to complete.