PHP实战：微信公众平台开发（五） 天气预报功能开发

　string mb_substr ( string $str , int $start [, int $length [, string $encoding ]] )

$str = mb_substr($keyword,-2,2,"UTF-8");

if($str == '天气' && !empty($str_key))
{
  //调用函数查询天气数据
}

{"weatherinfo":{
//基本信息;
"city":"苏州","city_en":"suzhou",
"date_y":"2013年7月9日","date":"","week":"星期二","fchh":"18","cityid":"101190401",
//摄氏温度
"temp1":"30℃~37℃",
"temp2":"30℃~37℃",
"temp3":"29℃~35℃",
"temp4":"27℃~33℃",
"temp5":"27℃~31℃",
"temp6":"27℃~35℃",
//华氏温度;
"tempF1":"86H~98.6H",
"tempF2":"86H~98.6H",
"tempF3":"84.2H~95H",
"tempF4":"80.6H~91.4H",
"tempF5":"80.6H~87.8H",
"tempF6":"80.6H~95H",
//天气描述;
"weather1":"晴转多云",
"weather2":"晴转多云",
"weather3":"晴转多云",
"weather4":"多云",
"weather5":"雷阵雨转中雨",
"weather6":"雷阵雨转多云",
//天气描述图片序号
"img1":"0",
"img2":"1",
"img3":"0",
"img4":"1",
"img5":"0",
"img6":"1",
"img7":"1",
"img8":"99",
"img9":"4",
"img10":"8",
"img11":"4",
"img12":"1",
//图片名称;
"img_single":"1",
"img_title1":"晴",
"img_title2":"多云",
"img_title3":"晴",
"img_title4":"多云",
"img_title5":"晴",
"img_title6":"多云",
"img_title7":"多云",
"img_title8":"多云",
"img_title9":"雷阵雨",
"img_title10":"中雨",
"img_title11":"雷阵雨",
"img_title12":"多云",
"img_title_single":"多云",
//风速描述
"wind1":"西南风3-4级",
"wind2":"西南风3-4级",
"wind3":"东南风3-4级",
"wind4":"东南风3-4级转4-5级",
"wind5":"东南风4-5级转西南风3-4级",
"wind6":"西南风3-4级转4-5级",
//风速级别描述
"fx1":"西南风",
"fx2":"西南风",
"fl1":"3-4级",
"fl2":"3-4级",
"fl3":"3-4级",
"fl4":"3-4级转4-5级",
"fl5":"4-5级转3-4级",
"fl6":"3-4级转4-5级",
//今日穿衣指数;
"index":"炎热",
"index_d":"天气炎热,建议着短衫、短裙、短裤、薄型T恤衫等清凉夏季服装.",
//48小时穿衣指数
"index48":"炎热",
"index48_d":"天气炎热,建议着短衫、短裙、短裤、薄型T恤衫等清凉夏季服装.",
//紫外线及48小时紫外线
"index_uv":"中等",
"index48_uv":"中等",
//洗车指数
"index_xc":"适宜",
//旅游指数
"index_tr":"较不宜",
//舒适指数
"index_co":"很不舒适",
"st1":"36",
"st2":"28",
"st3":"36",
"st4":"28",
"st5":"34",
"st6":"27",
//晨练指数
"index_cl":"较适宜",
//晾晒指数
"index_ls":"适宜",
//过敏指数
"index_ag":"不易发"}}

private function weather($n){
 include("weather_cityId.php");
 $c_name=$weather_cityId[$n];
 if(!empty($c_name)){
  $json=file_get_contents("http://m.weather.com.cn/data/".$c_name.".html");
  return json_decode($json);
 } else {
  return null;
 }
}

<?php
$weather_cityId = array("北京"=>"101010100","上海"=>"101020100","苏州"=>"101190401");
?>

$contentStr = "【".$data->weatherinfo->city."天气预报】\n".$data->weatherinfo->date_y." ".$data->weatherinfo->fchh."时发布"."\n\n实时天气\n".$data->weatherinfo->weather1." ".$data->weatherinfo->temp1." ".$data->weatherinfo->wind1."\n\n温馨提示：".$data->weatherinfo->index_d."\n\n明天\n".$data->weatherinfo->weather2." ".$data->weatherinfo->temp2." ".$data->weatherinfo->wind2."\n\n后天\n".$data->weatherinfo->weather3." ".$data->weatherinfo->temp3." ".$data->weatherinfo->wind3;

<?php
/**
 * wechat php test
 */
//define your token
define("TOKEN", "zhuojin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->responseMsg();
//$wechatObj->valid();
class wechatCallbackapiTest
{
 /*public function valid()
 {
  $echoStr = $_GET["echostr"];
  //valid signature , option
  if($this->checkSignature()){
   echo $echoStr;
   exit;
  }
 }*/
 public function responseMsg()
 {
  //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);
    $RX_TYPE = trim($postObj->MsgType);
    switch($RX_TYPE)
    {
     case "text":
      $resultStr = $this->handleText($postObj);
      break;
     case "event":
      $resultStr = $this->handleEvent($postObj);
      break;
     default:
      $resultStr = "Unknow msg type: ".$RX_TYPE;
      break;
    }
    echo $resultStr;
  }else {
   echo "";
   exit;
  }
 }
 public function handleText($postObj)
 {
  $fromUsername = $postObj->FromUserName;
  $toUsername = $postObj->ToUserName;
  $keyword = trim($postObj->Content);
  $time = time();
  $textTpl = "<xml>
     <ToUserName><![CDATA[%s]]></ToUserName>
     <FromUserName><![CDATA[%s]]></FromUserName>
     <CreateTime>%s</CreateTime>
     <MsgType><![CDATA[%s]]></MsgType>
     <Content><![CDATA[%s]]></Content>
     <FuncFlag>0</FuncFlag>
     </xml>";    
  if(!empty( $keyword ))
  {
   $msgType = "text";
   //天气
   $str = mb_substr($keyword,-2,2,"UTF-8");
   $str_key = mb_substr($keyword,0,-2,"UTF-8");
   if($str == '天气' && !empty($str_key)){
    $data = $this->weather($str_key);
    if(empty($data->weatherinfo)){
     $contentStr = "抱歉,没有查到\"".$str_key."\"的天气信息!";
    } else {
     $contentStr = "【".$data->weatherinfo->city."天气预报】\n".$data->weatherinfo->date_y." ".$data->weatherinfo->fchh."时发布"."\n\n实时天气\n".$data->weatherinfo->weather1." ".$data->weatherinfo->temp1." ".$data->weatherinfo->wind1."\n\n温馨提示：".$data->weatherinfo->index_d."\n\n明天\n".$data->weatherinfo->weather2." ".$data->weatherinfo->temp2." ".$data->weatherinfo->wind2."\n\n后天\n".$data->weatherinfo->weather3." ".$data->weatherinfo->temp3." ".$data->weatherinfo->wind3;
    }
   } else {
    $contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣,名城苏州,我们为您提供苏州本地生活指南,苏州相关信息查询,做最好的苏州微信平台."."\n"."目前平台功能如下："."\n"."【1】 查天气,如输入：苏州天气"."\n"."【2】 查公交,如输入：苏州公交178"."\n"."【3】 翻译,如输入：翻译I love you"."\n"."【4】 苏州信息查询,如输入：苏州观前街"."\n"."更多内容,敬请期待...";
   }
   $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
   echo $resultStr;
  }else{
   echo "Input something...";
  }
 }
 public function handleEvent($object)
 {
  $contentStr = "";
  switch ($object->Event)
  {
   case "subscribe":
    $contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号：zhuojinsz"."\n"."卓越锦绣,名城苏州,我们为您提供苏州本地生活指南,苏州相关信息查询,做最好的苏州微信平台."."\n"."目前平台功能如下："."\n"."【1】 查天气,如输入：苏州天气"."\n"."【2】 查公交,如输入：苏州公交178"."\n"."【3】 翻译,如输入：翻译I love you"."\n"."【4】 苏州信息查询,如输入：苏州观前街"."\n"."更多内容,敬请期待...";
    break;
   default :
    $contentStr = "Unknow Event: ".$object->Event;
    break;
  }
  $resultStr = $this->responseText($object, $contentStr);
  return $resultStr;
 }
 
 public function responseText($object, $content, $flag=0)
 {
  $textTpl = "<xml>
     <ToUserName><![CDATA[%s]]></ToUserName>
     <FromUserName><![CDATA[%s]]></FromUserName>
     <CreateTime>%s</CreateTime>
     <MsgType><![CDATA[text]]></MsgType>
     <Content><![CDATA[%s]]></Content>
     <FuncFlag>%d</FuncFlag>
     </xml>";
  $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
  return $resultStr;
 }
 private function weather($n){
  include("weather_cityId.php");
  $c_name=$weather_cityId[$n];
  if(!empty($c_name)){
   $json=file_get_contents("http://m.weather.com.cn/data/".$c_name.".html");
   return json_decode($json);
  } else {
   return null;
  }
 }
 private function checkSignature()
 {
  $signature = $_GET["signature"];
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"]; 
    
  $token = TOKEN;
  $tmpArr = array($token, $timestamp, $nonce);
  sort($tmpArr);
  $tmpStr = implode( $tmpArr );
  $tmpStr = sha1( $tmpStr );
  
  if( $tmpStr == $signature ){
   return true;
  }else{
   return false;
  }
 }
}
?>