該擴展基于官方的微信公眾平臺SDK,這里只做了簡單地封裝,實現(xiàn)了一些基本的功能,如天氣查詢,翻譯,自動聊天機器人,自定義菜單接口)僅供學(xué)習(xí)之用.代碼如下:

1. define("TOKEN", "xingans"); 
2.  
3. $wechatObj = new wechatCallbackapiTest(); 
4.  
5. $wechatObj->responseMsg(); 
6.  
7. class wechatCallbackapiTest 
8. { 
9.    //簽名驗證公共接口 
10.    public function valid() 
11.    { 
12.        $echoStr = $_GET["echostr"]; 
13.  
14.        if($this->checkSignature()){ 
15.            echo $echoStr; 
16.            exit; 
17.        } 
18.    } 
19.  
20.    //主入口處理函數(shù) 
21.    public function responseMsg() 
22.    { 
23.        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; 
24.  
25.        if (!emptyempty($postStr)){ 
26.                    
27.            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); 
28.            
29.            $msgType=trim($postObj->MsgType); 
30.            
31.            switch($msgType){ 
32.                case 'text': 
33.                    $resultStr=$this->handleText($postObj); 
34.                    break; 
35.                case 'event': 
36.                    $resultStr=$this->handleEvent($postObj); 
37.                    break; 
38.                default: 
39.                    $resultStr=$this->handleDefault($postObj); 
40.                    break; 
41.            } 
42.            
43.            echo $resultStr; 
44.            
45.        }else { 
46.            echo "Error"; 
47.            exit; 
48.        } 
49.    } 
50.    
51.    //處理文本消息 
52.       private function handleText($obj){ 
53.           
54.           $keyword=trim($obj->Content); 
55.           
56.           if(preg_match('/天氣/',$keyword)){ 
57.               $contentStr=$this->handleWeather($obj); 
58.           }elseif(preg_match('/翻譯/',$keyword)){ 
59.               $contentStr=$this->handleTranslation($obj); 
60.           }else{ 
61.               $contentStr=$this->handleChat($obj); 
62.           } 
63.           
64.           return $this->handleStr($obj,$contentStr); 
65.           
66.       } 
67.       
68.       //處理天氣 
69.       private function handleWeather($obj){ 
70.           $keyword=mb_substr($obj->Content,-2,2,'utf-8'); 
71.           $zone=mb_substr($obj->Content,0,-2,'utf-8'); 
72.           
73.           if($keyword=='天氣' && !emptyempty($zone)){ 
74.           
75.               $zoneArr=json_decode(file_get_contents('http://api.k780.com:88/?app=weather.city&format=json'),true); 
76.               $zoneArr=$zoneArr['result']; 
77.               
78.               $cityId=''; 
79.               
80.               foreach($zoneArr as $value){ 
81.                   if($zone==$value['citynm']){ 
82.                       $cityId=$value['weaid']; 
83.                       break; 
84.                   } 
85.               } 
86.               
87.               if(!emptyempty($cityId)){ 
88.                   $data=file_get_contents("http://api.k780.com:88/?app=weather.today&weaid=$cityId&appkey=10638&sign=3736578f099375665f9f141a6326b757&format=json"); 
89.  
90.                   $data=json_decode($data); 
91.                   
92.                   $contentStr="今天是:".$data->result->days.",".$data->result-> week.",".$data->result->citynm."天氣:".$data->result->weather."n溫度:".$data->result->temperature.", 
93.                   ".$data->result->wind_direction.",".$data->result->wind_power.", 最低溫度:".$data->result->temp_low.",最高溫度:".$data->result->temp_high; 
94.               }else{ 
95.                   $contentStr='找不到輸入的城市!'; 
96.               }    
97.               
98.           }else{ 
99.               $contentStr='輸入的查詢格式不正確!'; 
100.           } 
101.           
102.           return $contentStr; 
103.       } 
104.       
105.       //處理翻譯 
106.       private function handleTranslation($obj){ 
107.           $keyword=mb_substr($obj->Content,0,2,'utf-8'); 
108.        $words=mb_substr($obj->Content,2,220,'utf-8'); 
109.        
110.        if($keyword=='翻譯' && !emptyempty($words)){ 
111.            $data=file_get_contents('http://fanyi.youdao.com/openapi.do?keyfrom=zfsblog&key=364295447&type=data&doctype=json&version=1.1&q='.urlencode($words));        
112.            $data=json_decode($data,true); 
113.            
114.            switch($data['errorCode']){ 
115.                case '0': 
116.                    $contentStr=$data['translation'][0]; 
117.                    break; 
118.                case '20': 
119.                    $contentStr='要翻譯的文本過長'; 
120.                    break; 
121.                case '30': 
122.                    $contentStr='無法進行有效的翻譯'; 
123.                    break; 
124.                case '40': 
125.                    $contentStr='不支持的語言類型'; 
126.                    break; 
127.                case '50': 
128.                    $contentStr='無效的key'; 
129.                    break; 
130.                default: 
131.                    $contentStr='Error'; 
132.                    break; 
133.            } 
134.            
135.        }else{ 
136.            $contentStr='輸入的翻譯格式不正確!'; 
137.        } 
138.        
139.        return $contentStr; 
140.       } 
141.       
142.       //處理聊天信息 
143.       private function handleChat($obj){ 
144.           $keywords=$obj->Content; 
145.           
146.           $curlPost=array("chat"=>$keywords); 
147.    
148.        $ch = curl_init();//初始化curl 
149.        curl_setopt($ch, CURLOPT_URL,'http://www.xiaojo.com/bot/chata.php');//抓取指定網(wǎng)頁 
150.        curl_setopt($ch, CURLOPT_HEADER, 0);//設(shè)置header 
151.        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求結(jié)果為字符串且輸出到屏幕上 
152.        curl_setopt($ch, CURLOPT_POST, 1);//post提交方式 
153.        curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost); 
154.        $data = curl_exec($ch);//運行curl 
155.        curl_close($ch); 
156.        
157.        if(!emptyempty($data)){ 
158.            $contentStr=$data; 
159.        }else{ 
160.            $ran=rand(1,5); 
161.            
162.            switch($ran){ 
163.                case 1: 
164.                    $contentStr= "小九今天累了，明天再陪你聊天吧"; 
165.                    break; 
166.                case 2: 
167.                    $contentStr= "小九睡覺嘍~~"; 
168.                    break; 
169.                case 3: 
170.                    $contentStr= "呼呼~~呼呼~~"; 
171.                    break; 
172.                case 4: 
173.                    $contentStr= "你話好多啊，不跟你聊了"; 
174.                    break; 
175.                case 5: 
176.                    $contentStr= "你話好多啊，不跟你聊了"; 
177.                    break; 
178.            } 
179.        } 
180.        
181.        return $contentStr; 
182.       } 
183.       
184.       //創(chuàng)建自定義菜單 
185.       public function createMenu($data,$token){ 
186.           $ch = curl_init(); 
187.        
188.         curl_setopt($ch, CURLOPT_URL, "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=".$token); 
189.         curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); 
190.         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
191.         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
192.         curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)'); 
193.         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
194.         curl_setopt($ch, CURLOPT_AUTOREFERER, 1); 
195.         curl_setopt($ch, CURLOPT_POSTFIELDS, $data); 
196.         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
197.          
198.         $result = curl_exec($ch);      
199.          
200.         curl_close($ch); 
201.          
202.         return $result; 
203.       } 
204.       
205.       //查詢自定義菜單 
206.    function getMenu($token){ 
207.           $url="https://api.weixin.qq.com/cgi-bin/menu/get?access_token=$token"; 
208.           
209.           $ch = curl_init($url); 
210.           
211.        curl_setopt($ch, CURLOPT_RETURNTRANSFER,true) ; //獲取數(shù)據(jù)返回 
212.        curl_setopt($ch, CURLOPT_BINARYTRANSFER,true) ; //在啟用 CURLOPT_RETURNTRANSFER 時候?qū)@取數(shù)據(jù)返回    
213.        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false); 
214.        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false); 
215.        
216.        return $output = curl_exec($ch);        
217.       } 
218.       
219.       //刪除自定義菜單 
220.       public function deleteMenu($token){ 
221.           $url="https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=".$token; 
222.    
223.        $ch = curl_init(); 
224.        
225.        curl_setopt($ch, CURLOPT_URL, $url); 
226.        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
227.        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
228.        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
229.  
230.        $result = curl_exec($ch); 
231.        
232.        curl_close($ch); 
233.        
234.        return $result; 
235.       } 
236.  
237.       
238.       //處理事件消息 
239.       private function handleEvent($obj){ 
240.     
241.           $content=''; 
242.           
243.           switch($obj->Event){ 
244.               case 'subscribe': 
245.                   $content.="welcome-歡迎關(guān)注該公眾號號!"; 
246.                   break; 
247.               case 'unsubscribe': 
248.                   $content.="感謝您一直以來對該公眾號的關(guān)注,再見!"; 
249.                   break; 
250.               default: 
251.                   $content.=""; 
252.                   break; 
253.           } 
254.           
255.           return $this->handleStr($obj,$content); 
256.       } 
257.       
258.       //處理回復(fù)消息字符串 
259.       private function handleStr($obj,$content='',$flag=0){ 
260.        $textTpl = ""; 
261.           
262.           return sprintf($textTpl, $obj->FromUserName, $obj->ToUserName, time(), $content,$flag); 
263.       } 
264.    
265.    //簽名驗證函數(shù) 
266.    private function checkSignature() 
267.    { 
268.        $signature = $_GET["signature"]; 
269.        $timestamp = $_GET["timestamp"]; 
270.        $nonce = $_GET["nonce"];    
271.         //開源代碼Vevb.com 
272.        $token = TOKEN; 
273.        $tmpArr = array($token, $timestamp, $nonce); 
274.        sort($tmpArr, SORT_STRING); 
275.        $tmpStr = implode( $tmpArr ); 
276.        $tmpStr = sha1( $tmpStr ); 
277.        
278.        if( $tmpStr == $signature ){ 
279.            return true; 
280.        }else{ 
281.            return false; 
282.        } 
283.    } 
284. }