Craigslist scraper script

I need a script that can grab ads out of Craigslist, it should be written in php or perl, run from the command line, be able to accept which city and which category to pull as command line arguments and then pull the ad titles ,prices, locations, contact details, ad text, poster preferences and links to any attached pictures into a hash which I can manipulate (basically I will modify your script to process the data it collects).