82 lines
2.5 KiB
PHP
82 lines
2.5 KiB
PHP
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<?php
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/**
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* Phergie
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*
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* PHP version 5
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.
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* It is also available through the world-wide-web at this URL:
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* http://phergie.org/license
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*
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* @category Phergie
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* @package Phergie_Plugin_Temperature
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* @author Phergie Development Team <team@phergie.org>
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* @copyright 2008-2010 Phergie Development Team (http://phergie.org)
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* @license http://phergie.org/license New BSD License
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* @link http://pear.phergie.org/package/Phergie_Plugin_Temperature
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*/
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/**
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* Performs temperature calculations for other plugins.
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*
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* @category Phergie
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* @package Phergie_Plugin_Temperature
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* @author Phergie Development Team <team@phergie.org>
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* @license http://phergie.org/license New BSD License
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* @link http://pear.phergie.org/package/Phergie_Plugin_Temperature
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*/
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class Phergie_Plugin_Temperature extends Phergie_Plugin_Abstract
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{
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/**
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* Converts a temperature in Celsius to Fahrenheit.
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*
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* @param int $temp Temperature in Celsius
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*
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* @return int Temperature converted to Fahrenheit
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*/
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public function convertCelsiusToFahrenheit($temp)
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{
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return round(((((int) $temp * 9) / 5) + 32));
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}
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/**
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* Converts a temperature in Fahrenheit to Celsius.
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*
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* @param int $temp Temperature in Fahrenheit
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*
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* @return int Temperature converted to Celsius
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*/
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public function convertFahrenheitToCelsius($temp)
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{
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return round(((((int) $temp - 32) * 5) / 9));
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}
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/**
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* Calculates the heat index (i.e. "feels like" temperature) based on
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* temperature and relative humidity.
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*
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* @param int $temperature Temperature in degrees Fahrenheit
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* @param int $humidity Relative humidity (ex: 68)
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* @return int Heat index in degrees Fahrenheit
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*/
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public function getHeatIndex($temperature, $humidity)
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{
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$temperature2 = $temperature * $temperature;
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$humidity2 = $humidity * $humidity;
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return round(
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-42.379 +
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(2.04901523 * $temperature) +
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(10.14333127 * $humidity) -
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(0.22475541 * $temperature * $humidity) -
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(0.00683783 * $temperature2) -
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(0.05481717 * $humidity2) +
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(0.00122874 * $temperature2 * $humidity) +
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(0.00085282 * $temperature * $humidity2) -
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(0.00000199 * $temperature2 * $humidity2)
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);
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}
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}
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