微信分享到朋友圈(Thinkphp框架下实现方法)

PHP部分

扩展类代码部分:

<?php
namespace Think;
 
class JsSdk {
      private $appId;
      private $appSecret;
      public $debug = false;
 
  public function __construct($appId, $appSecret) {
        $this->appId = $appId;
        $this->appSecret = $appSecret;
  }
 
  public function getSignPackage() {
        $jsapiTicket = $this->getJsApiTicket();
        $url = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
        $timestamp = time();
        $nonceStr = $this->createNonceStr();
     
        // 这里参数的顺序要按照 key 值 ASCII 码升序排序
        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";
     
        $signature = sha1($string);
     
        $signPackage = array(
          "appId"     => $this->appId,
          "nonceStr"  => $nonceStr,
          "timestamp" => $timestamp,
          "url"       => $url,
          "signature" => $signature,
          "rawString" => $string
        );
        return $signPackage; 
  }
 
  private function createNonceStr($length = 16) {
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
          $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
  }
 
  private function getJsApiTicket() {
      //debug模式
      if ($this->debug) {
        // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
        $data = json_decode(file_get_contents("jsapi_ticket.json"));
      } else {
          //从cache中读取，基于ThinkPHP的缓存机制
          $data = (object)(S('jsapi_ticket_json'));
      }
 
    if ($data->expire_time < time()) {    
          $accessToken = $this->getAccessToken();
          $url = "http://api.weixin.qq.com/cgi-bin/ticket/getticket?type=1&access_token=$accessToken";
          $res = json_decode($this->httpGet($url));
          $ticket = $res->ticket;
           
          if ($ticket) {
            $data->expire_time = time() + 7200;
            $data->jsapi_ticket = $ticket;
                    
            //debug模式
            if ($this->debug) {
                $fp = fopen("jsapi_ticket.json", "w");
                fwrite($fp, json_encode($data));
                fclose($fp);
            } else {
                //将对象以数组的形式进行缓存
                S('jsapi_ticket_json', (array)$data);
            }
     
          }
        } else {
          $ticket = $data->jsapi_ticket;
        }
 
    return $ticket;
  }
 
  private function getAccessToken() {
 
      //debug模式
      if ($this->debug) {
        // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
          $data = json_decode(file_get_contents("access_token.json"));
          dump($data);
          die();
      } else {
          //从缓存中读取数组并转成对象
        $data = (Object)(S('access_token.json'));
      }
     
        if ($data->expire_time < time()) { 
          $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential
          &appid=$this->appId&secret=$this->appSecret";
          $res = json_decode($this->httpGet($url));
          $access_token = $res->access_token;
     
          if ($access_token) {
            $data->expire_time = time() + 7000;
            $data->access_token = $access_token;
     
            //debug模式
            if ($this->debug) {
                $fp = fopen("access_token.json", "w");
                fwrite($fp, json_encode($data));
                fclose($fp);
            } else {
                //缓存数组
                S('access_token.json', (array)$data);         
            }
             
          }
        } else {
          $access_token = $data->access_token;
        }
        return $access_token;
  }
 
  private function httpGet($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        curl_setopt($curl, CURLOPT_URL, $url);
        $res = curl_exec($curl);
        //错误检测
        $error = curl_error($curl);
        curl_close($curl);
         
        //发生错误，抛出异常
        if($error) throw new \Exception('请求发生错误(表检查是否在授权域名下访问)：' . $error);
         
        return $res;
      }
}