function _weather_format_temperature in Weather 6.5

Same name and namespace in other branches

1. 5.6 weather.module \_weather_format_temperature()
2. 5 weather.module \_weather_format_temperature()

Convert temperatures and calculate wind chill

Windchill temperature is only defined for temperatures at or below 50 °F and wind speeds above 3 mph. Bright sunshine may increase the wind chill temperature by 10 to 18 degrees F. @link http://www.weather.gov/os/windchill/windchillglossary.shtml

Parameters

array Temperature data:

array Wind data:

array The unit to be returned (celsius, fahrenheit):

array The display setting, whether to show windchill:

Return value

array Formatted representation, either in celsius or fahrenheit with the wind chill calculated

1 call to _weather_format_temperature()

theme_weather_theming in ./weather.module

Custom theme function for preprocessing the weather block output

File

./weather.module, line 1527

Display <acronym title="METeorological Aerodrome Report">METAR</acronym> weather data from anywhere in the world

Code

function _weather_format_temperature($temperature, $wind, $unit, $settings) {
  if (isset($settings['show_windchill']) and $settings['show_windchill'] == TRUE and $temperature['fahrenheit'] <= 50 and $wind['speed_mph'] >= 3) {

    // Calculate windchill (in degree Fahrenheit)
    $windchill['fahrenheit'] = round(35.74 + 0.6215000000000001 * $temperature['fahrenheit'] - 35.75 * pow($wind['speed_mph'], 0.16) + 0.4275 * $temperature['fahrenheit'] * pow($wind['speed_mph'], 0.16), 1);
    $windchill['celsius'] = round(($windchill['fahrenheit'] - 32) * 5 / 9, 1);
    if ($unit['temperature'] == 'fahrenheit') {
      $result['temperature_windchill'] = t('!temperature&thinsp;°F', array(
        '!temperature' => $windchill['fahrenheit'],
      ));
    }
    elseif ($unit['temperature'] == 'celsiusfahrenheit') {
      $result['temperature_windchill'] = t('!temperature_c&thinsp;°C / !temperature_f&thinsp;°F', array(
        '!temperature_c' => $windchill['celsius'],
        '!temperature_f' => $windchill['fahrenheit'],
      ));
    }
    elseif ($unit['temperature'] == 'fahrenheitcelsius') {
      $result['temperature_windchill'] = t('!temperature_f&thinsp;°F / !temperature_c&thinsp;°C', array(
        '!temperature_f' => $windchill['fahrenheit'],
        '!temperature_c' => $windchill['celsius'],
      ));
    }
    else {

      // default to metric units
      $result['temperature_windchill'] = t('!temperature&thinsp;°C', array(
        '!temperature' => $windchill['celsius'],
      ));
    }
  }

  // Format the temperature
  if ($unit['temperature'] == 'fahrenheit') {
    $result['temperature'] = t('!temperature&thinsp;°F', array(
      '!temperature' => $temperature['fahrenheit'],
    ));
  }
  elseif ($unit['temperature'] == 'celsiusfahrenheit') {
    $result['temperature'] = t('!temperature_c&thinsp;°C / !temperature_f&thinsp;°F', array(
      '!temperature_c' => $temperature['celsius'],
      '!temperature_f' => $temperature['fahrenheit'],
    ));
  }
  elseif ($unit['temperature'] == 'fahrenheitcelsius') {
    $result['temperature'] = t('!temperature_f&thinsp;°F / !temperature_c&thinsp;°C', array(
      '!temperature_f' => $temperature['fahrenheit'],
      '!temperature_c' => $temperature['celsius'],
    ));
  }
  else {

    // default to metric units
    $result['temperature'] = t('!temperature&thinsp;°C', array(
      '!temperature' => $temperature['celsius'],
    ));
  }
  return preg_replace("/([^ ]*)&thinsp;([^ ]*)/", '<span style="white-space:nowrap;">\\1&thinsp;\\2</span>', $result);
}