生成小程序二维码

    public function getCode()
    {
        $access_token = $this->getAccessToken();
        $width = 430; //二维码宽度
        $page = 'pages/index/index';//小程序路径(pages/index/index)
        $scene = '?type=1&user_id='.$this->auth->id; //携带的参数（?id=1&tag=2）
        $wx_api = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$access_token;
        $data = [
            'page'      => $page,
            'scene'     => $scene,
            'width'     => $width,
        ];
        $post_data  = json_encode($data);
        $result     = $this->getCurlQRcode($wx_api, $post_data); //获取微信小程序二维码
        print_r($result);exit;
        $filename = md5($this->auth->id);
        $qrcodePath = ROOT_PATH . 'public/uploads/qrcode/' . date('Ymd') . '/';
        if (!is_dir($qrcodePath)) {
            @mkdir($qrcodePath);
        }
        file_put_contents('./uploads/qrcode/'.date('Ymd')."/".$filename.'.png', $result, true);
        $path ='/uploads/qrcode/'.date('Ymd')."/".$filename.'.png';
        return $path;
    }
    
    function getCurlQRcode($url, $data)
    {
        $ch = curl_init();
        $header = array("Accept-Charset: utf-8");
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $tmpInfo = curl_exec($ch);
        if (curl_errno($ch)) {
            return false;
        }else{
            return $tmpInfo;
        }
    }

    /**
     * @return mixed|void
     * @ 获取token
     */
    public function getAccessToken()
    {
        $appid = config('site.app_id');
        $app_secret = config('site.app_secret');
        $url = "https://api.weixin.qq.com/cgi-bin/stable_token";
        $data = [
            'grant_type' => 'client_credential',
            'appid' => $appid,
            'secret' => $app_secret,
        ];
        $result = $this->httpPost($url, $data);
        if (isset($result['access_token']) && !empty($result['access_token'])) {
            return $result['access_token'];
        } else {
            $this->error('微信授权失败,错误码:'.$result['errmsg']);
        }
    }

    /**
     * 以post方式发起请求
     * @param $url
     * @param $data
     * @return bool|mixed
     */
    function httpPost($url, $data)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_HEADER, false);
        curl_setopt($curl, CURLOPT_POST, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data, JSON_UNESCAPED_UNICODE));
        list($content, $status) = array(curl_exec($curl), curl_getinfo($curl), curl_close($curl));
        return (intval($status["http_code"]) === 200) ? json_decode($content, true) : false;
    }