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function _weather_format_relative_humidity in Weather 6.5

Same name and namespace in other branches
  1. 5.6 weather.module \_weather_format_relative_humidity()
  2. 5 weather.module \_weather_format_relative_humidity()

Calculate the relative humidity

Parameters

float Temperature (must be Celsius):

float Dewpoint (must be Celsius):

Return value

string Formatted representation

1 call to _weather_format_relative_humidity()
theme_weather_theming in ./weather.module
Custom theme function for preprocessing the weather block output

File

./weather.module, line 1762
Display <acronym title="METeorological Aerodrome Report">METAR</acronym> weather data from anywhere in the world

Code

function _weather_format_relative_humidity($temperature, $dewpoint) {
  $e = 6.11 * pow(10, 7.5 * $dewpoint['celsius'] / (237.7 + $dewpoint['celsius']));
  $es = 6.11 * pow(10, 7.5 * $temperature['celsius'] / (237.7 + $temperature['celsius']));
  $result = t('!rel_humidity&thinsp;%', array(
    '!rel_humidity' => max(0, min(100, round(100 * ($e / $es), 0))),
  ));
  return preg_replace("/([^ ]*)&thinsp;([^ ]*)/", '<span style="white-space:nowrap;">\\1&thinsp;\\2</span>', $result);
}