PHP Web Site Scraper

There is a site I would like to scrape. Ideally this would be in the form of a PHP script with an HTML front end where I can simply press a button to start the scraper running. If PHP (or PHP alone) isn't enough to get the job done, please make other recommendations (but know that I work almost exclusively with LAMP environments). The script should output a CSV file that I can import into Google Docs as a spreadsheet. There might be one tricky thing (but I don't entirely know how scrapers do their work so maybe not): The site in question only provides its listings through pages that load via infinite scrolling (and there doesn't seem to be any fallback navigation for non-JS users). The vWorker-required statement for this kind of project: I attest on penalty of perjury that no messages will be sent in violation of the CAN-SPAM act, or any other U.S. law. It's also probably worth noting that the information I'm scraping is non-proprietary, publicly-available data, and the site doesn't have any terms that disallow this type of behavior.