解析雅虎天气API返回的XML数据

使用XMLReader解析

$url = 'http://weather.yahooapis.com/forecastrss?w=15015432&u=c';
$reader = new XMLReader();
$reader->open($url,'utf-8');
while($reader->read()){
    if($reader->name == 'yweather:condition'){
        $code = $reader->getAttribute('code');   //获取天气代码
        $temp = $reader->getAttribute('temp');   //获取温度
    }
    if($reader->name == 'yweather:atmosphere'){
        $humi = $reader->getAttribute('humidity');   //获取湿度
    }
}

使用DOMDocument解析

$url = 'http://weather.yahooapis.com/forecastrss?w=15015432&u=c';
$yweather = "http://xml.weather.yahoo.com/ns/rss/1.0";  //命名空间
$res = new DOMDocument();
$res->load($url);
 
$node = $res->getElementsByTagNameNS($yweather, 'atmosphere');
$humi = $node->item(0)->attributes->item(0)->nodeValue;     //获取湿度
$node = $res->getElementsByTagNameNS($yweather, 'condition');
$code = $node->item(0)->attributes->item(1)->nodeValue;     //获取天气代码
$temp = $node->item(0)->attributes->item(2)->nodeValue;     //获取温度

将数字格式的天气代码转换成相应的中文

function code2char($code){
    switch($code){
        case 0:
            return '龙卷风';
        case 1:
            return '热带风暴';
        case 2:
            return '暴风';
        case 3:
            return '大雷雨';
        case 4:
            return '雷阵雨';
        case 5:
            return '雨夹雪';
        case 6:
            return '雨夹雹';
        case 7:
            return '雪夹雹';
        case 8:
            return '冻雾雨';
        case 9:
            return '细雨';
        case 10:
            return '冻雨';
        case 11:
            return '阵雨';
        case 12:
            return '阵雨';
        case 13:
            return '阵雪';
        case 14:
            return '小阵雪';
        case 15:
            return '高吹雪';
        case 16:
            return '雪';
        case 17:
            return '冰雹';
        case 18:
            return '雨淞';
        case 19:
            return '粉尘';
        case 20:
            return '雾';
        case 21:
            return '薄雾';
        case 22:
            return '烟雾';
        case 23:
            return '大风';
        case 24:
            return '风';
        case 25:
            return '冷';
        case 26:
            return '阴';
        case 27:
            return '多云';
        case 28:
            return '多云';
        case 29:
            return '局部多云';
        case 30:
            return '局部多云';
        case 31:
            return '晴';
        case 32:
            return '晴';
        case 33:
            return '转晴';
        case 34:
            return '转晴';
        case 35:
            return '雨夹冰雹';
        case 36:
            return '热';
        case 37:
            return '局部雷雨';
        case 38:
            return '偶有雷雨';
        case 39:
            return '偶有雷雨';
        case 40:
            return '偶有阵雨';
        case 41:
            return '大雪';
        case 42:
            return '零星阵雪';
        case 43:
            return '大雪';
        case 44:
            return '局部多云';
        case 45:
            return '雷阵雨';
        case 46:
            return '阵雪';
        case 47:
            return '局部雷阵雨';
        default:
            return '水深火热';
    }