Google API コードを MSN API に簡単に変換するための関数は次のとおりです。
function skycode2image ($skycode)
{
$daynight = "na";
$skycodes = array (
0 => 'thunderstorm',
1 => 'thunderstorm',
2 => 'thunderstorm',
3 => 'thunderstorm',
4 => 'thunderstorm',
5 => 'rain_snow',
6 => 'sleet',
7 => 'rain_snow',
8 => 'icy',
9 => 'icy',
10 => 'rain_snow',
11 => 'showers',
12 => 'rain',
13 => 'flurries',
14 => 'snow',
15 => 'snow',
16 => 'snow',
17 => 'thunderstorm',
18 => 'showers',
19 => 'dust',
20 => 'fog',
21 => 'haze',
22 => 'haze',
23 => 'windy',
24 => 'windy',
25 => 'icy',
26 => 'cloudy',
27 => 'mostly_cloudy',
28 => 'mostly_cloudy',
29 => 'partly_cloudy',
30 => 'partly_cloudy',
31 => 'sunny',
32 => 'sunny',
33 => 'mostly_sunny',
34 => 'mostly_sunny',
35 => 'thunderstorm',
36 => 'hot',
37 => 'chance_of_tstorm',
38 => 'chance_of_tstorm',
39 => 'chance_of_rain',
40 => 'showers',
41 - 'chance_of_snow',
42 => 'snow',
43 => 'snow',
44 => 'na',
45 => 'chance_of_rain',
46 => 'chance_of_snow',
47 => 'chance_of_tstorm');
$condition = $skycodes[$skycode];
if (in_array($skycode,array(27,29,31,33,31,45,46,47))) $daynight = 'night';
if (in_array($skycode,array(28,30,32,34,36,37,38,39,41))) $daynight = 'day';
return array($condition,$daynight);
}