Temperature.php

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<?php
#require_once 'Zend/Measure/Abstract.php';
#require_once 'Zend/Locale.php';

class Zend_Measure_Temperature extends Zend_Measure_Abstract
{
    const STANDARD = 'KELVIN';

    const CELSIUS    = 'CELSIUS';
    const FAHRENHEIT = 'FAHRENHEIT';
    const RANKINE    = 'RANKINE';
    const REAUMUR    = 'REAUMUR';
    const KELVIN     = 'KELVIN';

    protected $_units = array(
        'CELSIUS'    => array(array('' => '1', '+' => '273.15'),'°C'),
        'FAHRENHEIT' => array(array('' => '1', '-' => '32', '/' => '1.8', '+' => '273.15'),'°F'),
        'RANKINE'    => array(array('' => '1', '/' => '1.8'),'°R'),
        'REAUMUR'    => array(array('' => '1', '*' => '1.25', '+' => '273.15'),'°r'),
        'KELVIN'     => array(1,'°K'),
        'STANDARD'   => 'KELVIN'
    );
}