上面那篇讲了翻译宝宝，调用有道翻译的接口，现在开发天气宝宝，调用的接口是中国气象网的，这个返回给用户的信息是图文信息。
先了解下中国气象网的api，其实只是一条url，即http://m.weather.com.cn/data/城市代码.html，如http://m.weather.com.cn/data/101280101.html，其中的101280101是城市代码，可以在浏览器输入这条url，看看返回什么数据。
{
"weatherinfo": {
"city": "广州",
"city_en": "guangzhou",
"date_y": "2013年2月27日",
"date": "",
"week": "星期三",
"fchh": "11",
"cityid": "101280101",
<!-- 从今天开始到第六天的每天的天气情况，这里的温度是摄氏温度 -->
"temp1": "25℃~19℃",
"temp2": "24℃~19℃",
"temp3": "25℃~13℃",
"temp4": "22℃~11℃",
"temp5": "16℃~9℃",
"temp6": "20℃~11℃",
<!-- 从今天开始到第六天的每天的天气情况，这里的温度是华氏温度 -->
"tempF1": "77℉~66.2℉",
"tempF2": "75.2℉~66.2℉",
"tempF3": "77℉~55.4℉",
"tempF4": "71.6℉~51.8℉",
"tempF5": "60.8℉~48.2℉",
"tempF6": "68℉~51.8℉",
<!-- 天气描述 -->
"weather1": "阴",
"weather2": "阴",
"weather3": "阴转小雨",
"weather4": "小雨",
"weather5": "阴转晴",
"weather6": "晴",
<!-- 天气描述图片序号 -->
"img1": "2",
"img2": "99",
"img3": "2",
"img4": "99",
"img5": "2",
"img6": "7",
"img7": "7",
"img8": "99",
"img9": "2",
"img10": "0",
"img11": "0",
"img12": "99",
"img_single": "2",
<!-- 图片名称 -->
"img_title1": "阴",
"img_title2": "阴",
"img_title3": "阴",
"img_title4": "阴",
"img_title5": "阴",
"img_title6": "小雨",
"img_title7": "小雨",
"img_title8": "小雨",
"img_title9": "阴",
"img_title10": "晴",
"img_title11": "晴",
"img_title12": "晴",
"img_title_single": "阴",
<!-- 风速描述 -->
"wind1": "微风",
"wind2": "微风",
"wind3": "微风转北风4-5级",
"wind4": "北风4-5级转3-4级",
"wind5": "微风",
"wind6": "微风",
<!-- 风速级别描述 -->
"fx1": "微风",
"fx2": "微风",
"fl1": "小于3级",
"fl2": "小于3级",
"fl3": "小于3级转4-5级",
"fl4": "4-5级转3-4级",
"fl5": "小于3级",
"fl6": "小于3级",
<!-- 今天穿衣指数 -->
"index": "舒适",
"index_d": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。",
<!-- 48小时穿衣指数 -->
"index48": "舒适",
"index48_d": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。",
<!-- 紫外线及48小时紫外线 -->
"index_uv": "最弱",
"index48_uv": "最弱",
<!-- 洗车 -->
"index_xc": "较适宜",
<!-- 旅游 -->
"index_tr": "适宜",
<!-- 舒适指数 -->
"index_co": "舒适",
"st1": "26",
"st2": "18",
"st3": "25",
"st4": "18",
"st5": "26",
"st6": "9",
<!-- 晨练 -->
"index_cl": "较适宜",
<!-- 晾晒 -->
"index_ls": "不太适宜",
<!-- 过敏 -->
"index_ag": "极不易发"
}
}
返回的是json格式的数据，至少返回的数据是什么意思，我也已注明。
在根目录下建立一个weather_code.php文件，里面主要是存储各城市的城市名和对应的城市代码，是一个数组，下面只显示部分数据：
<!--?php $weather_code = array( '北京' =--> 101010100,
'重庆' => 101040100,
'上海' => 101020100,
'天津' => 101030100,
'澳门' => 101330101,
'香港' => 101320101,
'合肥' => 101220101,
'蚌埠' => 101220201,
'芜湖' => 101220301,
'淮南' => 101220401,
'马鞍山' => 101220501,
'安庆' => 101220601,
'宿州' => 101220701
);
在index.php文件里，新建一个获取天气信息的方法，如下：
/**
* getWeather
* @param $keyword
* @return unknown
*/
function getWeather($keyword) {
include 'weather_code.php';
$code=$weather_code[$keyword];
$url="http://m.weather.com.cn/data/".$code.".html";
$file=file_get_contents($url);
$obj=json_decode($file);
$weatherinfo = $obj -> weatherinfo;
$city = $weatherinfo -> city;
$temp1=$weatherinfo->temp1;
$temp2=$weatherinfo->temp2;
$temp3=$weatherinfo->temp3;
$img1=$weatherinfo->img1;
$img2=$weatherinfo->img3;
$img3=$weatherinfo->img5;
$weather1=$weatherinfo->weather1;
$weather2=$weatherinfo->weather2;
$weather3=$weatherinfo->weather3;
$wind1=$weatherinfo->wind1;
$wind2=$weatherinfo->wind2;
$wind3=$weatherinfo->wind3;
$index=$weatherinfo->index;
$index_d=$weatherinfo->index_d;
$date_y=$weatherinfo->date_y;
$week=$weatherinfo->week;
$array = array(
array("title"=>$city." ".$week." ".$temp1." ".$weather1,"des"=>"testdes","pic"=>"http://api.itcreating.com/weather/image.jpg"),
array("title"=>$index_d,"des"=>"testdes"),
array("title"=>date("Y年m月d日")." ".$temp1." ".$weather1." ".$wind1,"des"=>"testdes","pic"=>"http://api.itcreating.com/weather/images/".$img1.".png"),
array("title"=>date("Y年m月d日",strtotime("+1 day"))." ".$temp2." ".$weather2." ".$wind2,"des"=>"testdes","pic"=>"http://api.itcreating.com/weather/images/".$img2.".png"),
array("title"=>date("Y年m月d日",strtotime("+2 day"))." ".$temp3." ".$weather3." ".$wind3,"des"=>"testdes","pic"=>"http://api.itcreating.com/weather/images/".$img3.".png"),
);
return $array;
}
这方法很简单，通过传入城市名，然后获取该城市的城市代码，接着通过中国气象网api发送请求，再将中国气象网返回的数据通过PHP的JSON解析函数json_decode将JSON格式的数据解析为PHP的关联数组，最后将我们需要的信息取出来再封装成数组。
注释掉$wechatObj->responseMsg();
在$wechatObj->responseMsg()下面加入$wechatObj->responseImgMsg();并新建一个responseImgMsg方法，如下：
public function responseImgMsg()
{
//get post data, May be due to the different environments
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
//extract post data
if (!empty($postStr)){
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$fromUsername = $postObj->FromUserName;
$toUsername = $postObj->ToUserName;
$keyword = trim($postObj->Content);
$time = time();
$textHaderTpl = "
<![CDATA[%s]]>
<![CDATA[%s]]>
%s
<![CDATA[news]]>
%d
";
$textContentTpl = "
<![CDATA[%s]]>
<![CDATA[%s]]>
<![CDATA[%s]]>
<![CDATA[%s]]>
";
$textFooterTpl = "
1
";
if(!empty( $keyword ))
{
$msgType = "news";
// 判断是否首次关注
if ( $keyword == "Hello2BizUser" ) {
}else {
$array = getWeather($keyword);
$resultHaderStr = sprintf($textHaderTpl, $fromUsername, $toUsername, $time, count($array));
foreach ($array as $key => $value) {
$resultContentStr .= sprintf($textContentTpl, $value['title'], $value['des'], $value['pic'], $value['url']);
}
$resultFooterStr = sprintf($textFooterTpl);
echo $resultStr = $resultHaderStr,$resultContentStr,$resultFooterStr;
}
}else{
echo "Input something...";
}
}else {
echo "";
exit;
}
}
要返回图文消息的，就要使用数组这种方式将将消息输出。
源码已在github上托管，可以上去下载，地址：https://github.com/hxxy2003/Weather-weixin
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