Yahoo! Weather

The Basics

Author	Ryan Parman
Revision	1
SimplePie version	1.0
Classes Extended	SimplePie_Item

This add-on adds methods for easily working with Yahoo! Weather feeds. Yahoo! Weather feeds can be found at http://developer.yahoo.com/weather/. This add-on was heavily inspired by the Get Yahoo! Weather with SimplePie tutorial over at JiveBay.com.

Installation

Instructions

Create a new file called simplepie_yahoo_weather.inc and place it in the same directory as your simplepie.inc file.
On the SimplePie-enabled page you want to use this extension on, make sure you include it in the same way that you include simplepie.inc.

Add-on Source Code

<?php
/**
 * SimplePie Add-on for Yahoo! Weather
 *
 * Copyright (c) 2004-2007, Ryan Parman and Geoffrey Sneddon
 * All rights reserved. License matches the current SimplePie license.
 */
 
// Define the namespace for simplicity.
if (!defined('SIMPLEPIE_NAMESPACE_YWEATHER'))
{
	define('SIMPLEPIE_NAMESPACE_YWEATHER', 'http://xml.weather.yahoo.com/ns/rss/1.0');
}
 
// Extend the SimplePie_Item class.
class SimplePie_Item_YWeather extends SimplePie_Item
{
	// Get <yweather:location> data
	function _get_location()
	{
		$feed = $this->get_feed();
		return $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'location');
	}
 
	function get_city()
	{
		$data = $this->_get_location();
		return $data[0]['attribs']['']['city'];
	}
 
	function get_region()
	{
		$data = $this->_get_location();
		return $data[0]['attribs']['']['region'];
	}
 
	function get_state()
	{
		return $this->get_region();
	}
 
	function get_country()
	{
		$data = $this->_get_location();
		return $data[0]['attribs']['']['country'];
	}
 
 
	// Get <yweather:units> data
	function _get_units()
	{
		$feed = $this->get_feed();
		return $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'units');
	}
 
	function get_units_temp()
	{
		$data = $this->_get_units();
		return $data[0]['attribs']['']['temperature'];
	}
 
	function get_units_distance()
	{
		$data = $this->_get_units();
		return $data[0]['attribs']['']['distance'];
	}
 
	function get_units_pressure()
	{
		$data = $this->_get_units();
		return $data[0]['attribs']['']['pressure'];
	}
 
	function get_units_speed()
	{
		$data = $this->_get_units();
		return $data[0]['attribs']['']['speed'];
	}
 
 
	// Get <yweather:wind> data
	function _get_wind()
	{
		$feed = $this->get_feed();
		return $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'wind');
	}
 
	function get_wind_chill()
	{
		$data = $this->_get_wind();
		return $data[0]['attribs']['']['chill'];
	}
 
	function get_wind_direction_degrees()
	{
		$data = $this->_get_wind();
		return $data[0]['attribs']['']['direction'];
	}
 
	function get_wind_direction()
	{
		$wind_direction = $this->get_wind_direction_degrees();
 
		// Calculations taken from http://jivebay.com/2007/07/25/get-yahoo-weather-with-simplepie/
                if ($wind_direction == 0){
                        $wind_direction_converted = "VAR";
                }
		else if ($wind_direction > 348.75 || $wind_direction < 11.25)
			$wind_direction_converted = "N";
		else if ($wind_direction > 11.25 && $wind_direction < 33.75)
			$wind_direction_converted = "NNE";
		else if ($wind_direction > 33.75 && $wind_direction < 56.25)
			$wind_direction_converted = "NE";
		else if ($wind_direction > 56.25 && $wind_direction < 78.75)
			$wind_direction_converted = "ENE";
		else if ($wind_direction > 78.75 && $wind_direction < 101.25)
			$wind_direction_converted = "E";
		else if ($wind_direction > 101.25 && $wind_direction < 123.75)
			$wind_direction_converted = "ESE";
		else if ($wind_direction > 123.75 && $wind_direction < 146.25)
			$wind_direction_converted = "SE";
		else if ($wind_direction > 146.25 && $wind_direction < 168.75)
			$wind_direction_converted = "SSE";
		else if ($wind_direction > 168.75 && $wind_direction < 191.25)
			$wind_direction_converted = "S";
		else if ($wind_direction > 191.25 && $wind_direction < 213.75)
			$wind_direction_converted = "SSW";
		else if ($wind_direction > 213.75 && $wind_direction < 236.25)
			$wind_direction_converted = "SW";
		else if ($wind_direction > 236.25 && $wind_direction < 258.75)
			$wind_direction_converted = "WSW";
		else if ($wind_direction > 258.75 && $wind_direction < 281.25)
			$wind_direction_converted = "W";
		else if ($wind_direction > 281.25 && $wind_direction < 303.75)
			$wind_direction_converted = "WNW";
		else if ($wind_direction > 303.75 && $wind_direction < 326.25)
			$wind_direction_converted = "NW";
		else if ($wind_direction > 326.25 && $wind_direction < 348.75)
			$wind_direction_converted = "NNW";
		else $wind_direction_converted = null;
 
		return $wind_direction_converted;
	}
 
	function get_wind_speed()
	{
		$data = $this->_get_wind();
		return $data[0]['attribs']['']['speed'];
	}
 
 
	// Get <yweather:atmosphere> data
	function _get_atmosphere()
	{
		$feed = $this->get_feed();
		return $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'atmosphere');
	}
 
	function get_humidity()
	{
		$data = $this->_get_atmosphere();
		return $data[0]['attribs']['']['humidity'];
	}
 
	function get_visibility()
	{
		$data = $this->_get_atmosphere();
		return $data[0]['attribs']['']['visibility'];
	}
 
	function get_pressure()
	{
		$data = $this->_get_atmosphere();
		return $data[0]['attribs']['']['pressure'];
	}
 
	function get_rising()
	{
		$data = $this->_get_atmosphere();
		return $data[0]['attribs']['']['rising'];
	}
 
 
	// Get <yweather:astronomy> data
	function _get_astronomy()
	{
		$feed = $this->get_feed();
		return $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'astronomy');
	}
 
	function get_sunrise()
	{
		$data = $this->_get_astronomy();
		return $data[0]['attribs']['']['sunrise'];
	}
 
	function get_sunset()
	{
		$data = $this->_get_astronomy();
		return $data[0]['attribs']['']['sunset'];
	}
 
 
	// Get <yweather:condition> data
	function _get_condition()
	{
		return $this->get_item_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'condition');
	}
 
	function get_condition()
	{
		$data = $this->_get_condition();
		return $data[0]['attribs']['']['text'];
	}
 
	function get_condition_code()
	{
		$data = $this->_get_condition();
		return $data[0]['attribs']['']['code'];
	}
 
	function get_condition_image()
	{
		return 'http://l.yimg.com/us.yimg.com/i/us/we/52/' . $this->get_condition_code() . '.gif';
	}
 
	function get_temperature()
	{
		$data = $this->_get_condition();
		return $data[0]['attribs']['']['temp'];
	}
 
	function get_last_updated($format = null)
	{
		$data = $this->_get_condition();
 
		if ($format)
		{
			return date($format, SimplePie_Misc::parse_date($data[0]['attribs']['']['date']));
		}
		else
		{
			return $data[0]['attribs']['']['date'];
		}
	}
 
 
	// Get <yweather:forecast> data
	function _get_forecast()
	{
		return $this->get_item_tags(SIMPLEPIE_NAMESPACE_YWEATHER, 'forecast');
	}
 
	function get_forecast($key = 0)
	{
		$forecasts = $this->get_forecasts();
		if (isset($forecasts[$key]))
		{
			return $forecasts[$key];
		}
		else
		{
			return null;
		}
	}
 
	function get_forecasts()
	{
		$temp = array();
		$data = $this->_get_forecast();
		foreach ($data as $forecast)
		{
			$temp[] = new SimplePie_YWeather_Forecast($forecast['attribs']['']['date'], $forecast['attribs']['']['low'], $forecast['attribs']['']['high'], $forecast['attribs']['']['text'], $forecast['attribs']['']['code']);
		}
		return $temp;
	}
}
 
class SimplePie_YWeather_Forecast
{
	var $date;
	var $low;
	var $high;
	var $label;
	var $code;
 
	function SimplePie_YWeather_Forecast($date, $low, $high, $label, $code)
	{
		$this->date = $date;
		$this->low = $low;
		$this->high = $high;
		$this->label = $label;
		$this->code = $code;
	}
 
	function get_date($format = null)
	{
		if ($format)
		{
			return date($format, SimplePie_Misc::parse_date($this->date));
		}
		else
		{
			return $this->date;
		}
	}
 
	function get_low()
	{
		return $this->low;
	}
 
	function get_high()
	{
		return $this->high;
	}
 
	function get_label()
	{
		return $this->label;
	}
 
	function get_code()
	{
		return $this->code;
	}
 
	function get_image()
	{
		return 'http://l.yimg.com/us.yimg.com/i/us/we/52/' . $this->get_code() . '.gif';
	}
}
 
?>

Using the Add-on

Methods

get_city()
The city the weather is for.
get_region()
The region that the city is in.
get_state()
Completely identical to get_region(). This might make better sense in the U.S.
get_country()
The country that the city is in.
get_units_temp()
The units used for the temperature.
get_units_distance()
The units used for the distance.
get_units_pressure()
The units used for the pressure.
get_units_speed()
The units used for the speed.
get_wind_chill()
The “feels like” temperature due to wind.
get_wind_direction_degrees()
The degrees (out of a circular 360 degrees) marking the direction of the wind.
get_wind_direction()
The human-understandable name of the direction of the wind.
get_wind_speed()
The wind speed.
get_humidity()
The current humidity.
get_visibility()
The distance of visibility.
get_pressure()
The air pressure.
get_rising()
The rising
get_sunrise()
The time of today's sunrise.
get_sunset()
The time of today's sunset.
get_condition()
Current conditions.
get_condition_code()
Code for current conditions.
get_temperature()
Get the current temperature.
get_last_updated($format)
The timestamp of the last update. The $format parameter takes anything that is supported by PHP's http://php.net/date function.
get_forecast()
Get a single forecast (typically one of two). Has sub-methods.
get_forecasts()
Get all forecasts (typically two) as an array. Has sub-methods.

Sub-Methods for get_forecast() and get_forecasts()

get_date($format)
Gets the date of the forecast. The $format parameter takes anything that is supported by PHP's http://php.net/date function.
get_low()
Gets the “low” temperature of the forecast.
get_high()
Gets the “high” temperature of the forecast.
get_label()
Gets the human-readable description of the forecast.
get_code()
Gets the code of the forecast.

Example Code

<?php
require_once('simplepie.inc');
require_once('simplepie_yahoo_weather.inc');
 
// Initialize a new SimplePie object.
$feed = new SimplePie();
 
// Parse a Yahoo! Weather feed for San Francisco, CA
$feed->set_feed_url('http://weather.yahooapis.com/forecastrss?p=USCA0987');
 
// We're going to override the built-in SimplePie_Item class with the SimplePie_Item_YWeather class.
$feed->set_item_class('SimplePie_Item_YWeather');
 
// Initialize the feed
$feed->init();
 
// Since Y! Weather feeds only have one item, we'll base everything around that.
$weather = $feed->get_item(0);
 
// Begin XHTML page
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">	
<head>
	<title>Sample Yahoo Weather Page</title>
	<style type="text/css">
	h1 {
		padding:0 0 0 60px;
		background:transparent url(<?php echo $weather->get_condition_image(); ?>) no-repeat 0 10%;
		line-height:2em;
	}
	</style>
</head>
<body>
	<h1><a href="<?php echo $feed->get_permalink(); ?>"><?php echo $feed->get_title(); ?></a></h1>
	<ul>
		<li><strong>Currently:</strong> <?php echo $weather->get_condition(); ?>, <?php echo $weather->get_temperature(); ?>&deg;<?php echo $weather->get_units_temp(); ?> (feels like <?php echo $weather->get_wind_chill(); ?>&deg;<?php echo $weather->get_units_temp(); ?>)</li>
		<li><strong>Wind:</strong> <?php echo $weather->get_wind_speed(); ?><?php echo $weather->get_units_speed(); ?>, <?php echo $weather->get_wind_direction(); ?></li>
		<li><strong>Sunrise:</strong> <?php echo $weather->get_sunrise(); ?></li>
		<li><strong>Sunset:</strong> <?php echo $weather->get_sunset(); ?></li>
	</ul>
 
	<h2>Forecast</h2>
	<ul>
		<?php foreach ($weather->get_forecasts() as $forecast): ?>
 
		<li><?php echo $forecast->get_date('l, F jS'); ?> &mdash; Low: <?php echo $forecast->get_low(); ?>; High: <?php echo $forecast->get_high(); ?>; <?php echo $forecast->get_label(); ?></li>
 
		<?php endforeach; ?>
	</ul>
</body>
</html>

addons/yahoo_weather.txt · Last modified: 2011/10/30 09:50 by shane_xu