# XML Transaction — Retrieving a Yahoo! Weather RSS (XML) Feed via a Server-Side Proxy

This example demonstrates how to use IO and a PHP proxy — to work around XMLHttpRequest's same-domain policy — to retrieve an XML document from `http://xml.weather.yahoo.com/forecastrss`.

To try out the example, fill in your five-digit US zip code, or Location ID.

Zip Code or Location ID

Please enter a U.S. Zip Code or a location ID to get the current temperature. The default is Zip Code 94089 for Sunnyvale, California; its location ID is: USCA1116.