PHP实现微信公众账号开发

1、首先需要一个可以外网访问的接口url。

　　我这里是申请的新浪免费云服务器，http://xxxxx.applinzi.com/wx.php,具体自己可以去新浪云中心申请地址为：http://www.sinacloud.com

2、去微信公众账号申请个人的公众账号，地址为：https://mp.weixin.qq.com，然后进入到左侧菜单开发里面选择基本配置。

3、点击修改配置，填写必要的信息，认证如下图：

需要在wx.php里面写入认证代码，具体代码下文会提供。

4、等待认证成功后，启用配置

附详细代码：

  1 valid();  6   7 class wechatCallbackapiTest {  8     public function valid()  9     { 10         
　　　　　　 //这里是认证过程
　　　　　　　$echoStr = $_GET["echostr"]; 11         if($this->checkSignature() && $echoStr) { 12             echo $echoStr; 13             exit; 14         } else { 15             $this->responseMsg();//当认证成功后执行下面的代码 16         } 17     } 18  19     private function responseMsg() { 20  21         $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; 22         if (!empty($postStr)) { 23                 libxml_disable_entity_loader(true); 24                 $textTpl = " 25                              26                              27                             %s 28                              29                              30                             0 31                             "; 32                 $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); 33                 //第一次关注的时候 34                 if (strtolower($postObj->MsgType) == 'event') { 35                     if (strtolower($postObj->Event) == 'subscribe') { 36                         $toUsername = $postObj->ToUserName; 37                         $fromUsername = $postObj->FromUserName; 38                         $time = time(); 39                         $msgType = "text"; 40                         $contentStr = ">"; 41                         $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr); 42                         echo $resultStr; 43                     } 44                 //关键字文本回复 45                 } else if ( strtolower($postObj->MsgType) == 'text' ) { 46                     if ( $postObj->Content == 'imooc' ) { 47                         $toUsername = $postObj->ToUserName; 48                         $fromUsername = $postObj->FromUserName; 49                         $time = time(); 50                         $msgType = "text"; 51                         $contentStr = "imooc is very good"; 52                         $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr); 53                         echo $resultStr; 54                         exit; 55                     } else if ( $postObj->Content == '美丽说' ) { 56                         $array = array( 57                             array( 58                               'title' => 'meilishuo',  59                               'description'=> 'meilishuo is very good', 60                               'picurl' => 'http://d05.res.meilishuo.net/img/_o/67/24/65bc4ebfe22d0c2eca1702c9736c_117_43.ch.png', 61                               'url' => 'http://www.meilishuo.com' 62                             ) 63                         ); 64                         $imageTpl = " 65                                      66                                      67                                     %s 68                                      69                                     ".count($array)." 70                                     "; 71                         foreach ($array as $key => $value) { 72                             $imageTpl .= 73                                     " 74                                      75                                      76                                      77                                      78                                     ";  79                         } 80                         $imageTpl .= ""; 81                         $toUsername = $postObj->ToUserName; 82                         $fromUsername = $postObj->FromUserName; 83                         $time = time(); 84                         $msgType = "news"; 85                         $resultStr = sprintf($imageTpl, $fromUsername, $toUsername, $time, $msgType); 86                         echo $resultStr; 87                         exit; 88                     } 89         } 90  91         } else { 92             echo ""; 93             exit; 94         } 95  96     } 97  98     private function checkSignature() { 99         if (!defined("TOKEN")) {100             throw new Exception('TOKEN is not defined!');101         }102         103         $signature = $_GET["signature"];104         $timestamp = $_GET["timestamp"];105         $nonce = $_GET["nonce"]; 106         $token = TOKEN;107         $tmpArr = array($token, $timestamp, $nonce);108         sort($tmpArr, SORT_STRING);109         $tmpStr = implode( $tmpArr );110         $tmpStr = sha1( $tmpStr );111         return ($tmpStr == $signature) ? true : false;112    }113 }