php微信开发之百度天气预报

$location = $cityName;
$output = 'json';
$querystring_arrays = array(
'ak' => $ak,'location' => $location,'output' => $output
);

$querystring = http_build_query($querystring_arrays);
//生成sn
$sn = md5(urlencode($uri.'?'.$querystring.$sk));
$targetUrl = sprintf($url,$ak,urlencode($location),$output,$sn);

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$targetUrl);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$result = curl_exec($ch);
curl_close($ch);
$result = json_decode($result,true);

if($result["error"]!=0){
return $result["status"];
}

$curHour = (int)date('H',time());
$weather = $result["results"][0];
$weatherArray[]=array("Title"=>$weather['currentCity']."天气预报","Description"=>"","PicUrl"=>"","Url"=>"");
for($i = 0;$i<count($weather["weather_data"]);$i++){
$weatherArray[] = array("Title"=>
$weather["weather_data"][$i]["data"]."\n".
$weather["weather_data"][$i]["weather"].
$weather["weather_data"][$i]["wind"].
$weather["weather_data"][$i]["temperature"],"PicUrl"=>(($curHour>=6)&&($curHour<
18))?$weather["weather_data"][$i]["dayPictureUrl"]:$weather["weather_data"][$i]["nightPictureUrl"],"URL"=>""
);
}
return $weatherArray;
}

• 百度天气预报案例实现
• 实现思路：
• 1.申请百度ak、sk
• 2.使用百度天气预报接口
• 3.实现天气信息功能
• 4.实现事件响应功能
  */
  $wechatObj = new wechatCallbackapiTest();
  if (!isset($_GET['echostr'])) {
  $wechatObj->responseMsg();
  }else{
  $wechatObj->valid();
  }

class wechatCallbackapiTest
{
//验证签名
public function valid()
{
$echoStr = $_GET["echostr"];
if($this->checkSignature()){
header('content-type:text');
echo $echoStr;
exit;
}
}

public 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;
}
}

//响应消息
public function responseMsg()
{
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
if (!empty($postStr)){
$this->logger("R ".$postStr);
$postObj = simplexml_load_string($postStr,'SimpleXMLElement',LIBXML_NOCDATA);
$RX_TYPE = trim($postObj->MsgType);

//消息类型分离
switch ($RX_TYPE)
{
case "event":
$result = $this->receiveEvent($postObj);
break;
case "text":
$result = $this->receiveText($postObj);
break;
default:
$result = "unknown msg type: ".$RX_TYPE;
break;
}
echo $result;
}else {
echo "";
exit;
}
}

//接收事件消息
public function receiveEvent($object)
{
$content = "";
switch ($object->Event)
{
case "subscribe":
$content = "欢迎关注Nicky的公众号 ";
$content .= (!empty($object->EventKey))?("\n来自二维码场景 ".strreplace("qrscene","",$object->EventKey)):"";
break;
case "unsubscribe":
$content = "取消关注";
break;
}
$result = $this->transmitText($object,$content);
return $result;
}

//接收文本消息
public function receiveText($object)
{
$keyword = trim($object->Content);

//自动回复模式

if (strstr($keyword,"天气")){
$city = str_replace('天气','',$keyword);
include("baiduweather.PHP");
$content = getWeatherInfo($city);
}
$result = $this->transmitNews($object,$content);
return $result;
}

//回复图文消息
public function transmitNews($object,$newsArray)
{
if(!is_array($newsArray)){
return;
}
$itemTpl = "

$result = sprintf($xmlTpl,$object->FromUserName,$object->ToUserName,time(),count($newsArray));
return $result;
}

//日志记录
public function logger($log_content)
{
if(isset($_SERVER['HTTP_APPNAME'])){ //SAE
SAE_set_display_errors(false);
SAE_debug($log_content);
SAE_set_display_errors(true);
}else if($_SERVER['REMOTE_ADDR'] != "127.0.0.1"){ //LOCAL
$max_size = 10000;
$log_filename = "log.xml";
if(file_exists($log_filename) and (abs(filesize($log_filename)) > $max_size)){unlink($log_filename);}
file_put_contents($log_filename,date('H:i:s')." ".$log_content."\r\n",FILE_APPEND);
}
}

}
?>