微信公众号jssdk

step1:获取accesss_token

    //获取accesstoken
    public function getAccessToken()
    {
        $APPID = 'wxe43ed0c0c91b2f3c';
        $APPSECRET = '47e1bda71e378527cc0c80a394c779f4';
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$APPID."&secret=".$APPSECRET;
        // 微信返回的信息
        $returnData = json_decode($this->curlHttp($url));
        $resData['accessToken'] = $returnData->access_token;
        $resData['expiresIn'] = $returnData->expires_in;
        $resData['time'] = date("Y-m-d H:i",time());
 
        $res = $resData;
        return $res;
    }

 // 服务端发起请求
    public function curlHttp($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true );
        curl_setopt($curl, CURLOPT_TIMEOUT, 500 );
        curl_setopt($curl, CURLOPT_URL, $url );
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,false);
        $res = curl_exec($curl);
        curl_close($curl);
        return $res;
    }

step2:获取api_ticket

    public function getJsApiTicket($accessToken) {
 
        $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=".$accessToken."&&type=jsapi";
        // 微信返回的信息
        $returnData = json_decode($this->curlHttp($url));
 
        $resData['ticket'] = $returnData->ticket;
        $resData['expiresIn'] = $returnData ->expires_in;
        $resData['time'] = date("Y-m-d H:i",time());
        $resData['errcode'] = $returnData->errcode;
 
        return $resData;
    }

step3:获取签名

    // 获取签名
    public function getSignPackage() {
        $this->load->helper('url');
        // 获取token
        $token = $this->getAccessToken();
        // 获取ticket
        $ticketList = $this->getJsApiTicket($token['accessToken']);
        $ticket = $ticketList['ticket'];
       
        $url = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
        // var_dump('http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
        // 生成时间戳
        $timestamp = time();
        // 生成随机字符串
        $nonceStr = $this->createNoncestr();
        // 这里参数的顺序要按照 key 值 ASCII 码升序排序 j -> n -> t -> u
        $string = "jsapi_ticket=".$ticket."&noncestr=".$nonceStr."×tamp=".$timestamp."&url=".$url;
        $signature = sha1($string);
        $signPackage = array (
            "appId" => 'wxe43ed0c0c91b2f3c',
            "nonceStr" => $nonceStr,
            "timestamp" => $timestamp,
            "url" => $url,
            "signature" => $signature,
            "rawString" => $string,
            "ticket" => $ticket,
            "token" => $token['accessToken']
        );

        // 返回数据给前端
        return $signPackage;
    }

    // 创建随机字符串
    public 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;
    }

至此，后端工作完成

step4:前端config

wx.confg({})