The weather lookup portion of this app will work in a similar way to the find portion. When we send a text saying "weather", it returns today's and tomorrow's forecast. We're going to use Yahoo's own weather lookup API for this is already built into Yahoo's YQL system.

We're also going to make use of Yahoo's geo places system that will take our phone number's registered location and return a unique ID that the weather service will use to perform the lookup.

Our query will actually return two messages. The first message is the current forecast; the second message is the forecast for tomorrow.

<?php
$location = whereami( $from );
$results = weather( $location->woeid );
$forecast = $results...