// 获取acckenhere 并且存入数据库
    $where[‘id‘]=1;
    $accken_token=  db("wx_acctoken")->where($where)->find();
    $token=$accken_token[‘accken_token‘];
    if(($accken_token[‘ad_time‘]+6500)<=time()){
        $accken_token=$this->getWxAccessToken();
        $data[‘accken_token‘]=$accken_token[‘access_token‘];
        $data[‘ad_time‘]=time();
        $ud= Db::name(‘wx_acctoken‘)->where($where)->update($data);
        $token=$accken_token[‘access_token‘];
    }
    //   $url="https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$token;
    $qcode ="https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=$token";

   //$param = json_encode(array("path"=>"pages/index/index?shop_id=".$shop_id."&uid=".$uid."&enter=1","width"=> 100));
    $param =json_encode(array("path"=>"pages/start_the/start_the?dot_id=".$dot_id."","width"=> 100));

    $result=$this->send_post( $qcode, $param,"POST");

    $base64_image = "data:image/jpeg;base64,".base64_encode( $result );

    $new_name = $this->base64_save($base64_image,‘./qrcode/‘);
    //查二维码
 //   $code_url = $this->generate($res);
    $up =array(
        ‘token‘=>$new_name
    );
    Db::name("information")->where("id",$dot_id)->update($up);
    return $new_name;
}

// 获取AccessToken
public function getWxAccessToken(){
    $appid=‘*****‘;
    $appsecret=‘***‘;
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;
    $access_token = $this->makeRequest($url);
    $access_token = json_decode($access_token[‘result‘],true);
    return $access_token;

}
protected function send_post( $url, $post_data ) {
    $options = array(
        ‘http‘ => array(
            ‘method‘  => ‘POST‘,
            ‘header‘  => ‘Content-type:application/json‘,
            //header 需要设置为 JSON
            ‘content‘ => $post_data,
            ‘timeout‘ => 60
            //超时时间
        )
    );
    $context = stream_context_create( $options );
    $result = file_get_contents( $url, false, $context );
    return $result;
}
    /*
* 保存base64格式图片到指定文件夹中
* $base64_img 图片数据
* $path 要保存到的图片地址
*/
function base64_save($base64_img,$path){
    $img_base = str_replace(‘data:image/jpeg;base64,‘, ‘‘, $base64_img);
    $img_name = time().rand(1000,9999).‘.jpg‘; //图片新名称
    $img_path = $path.$img_name;
    file_put_contents($img_path,base64_decode($img_base));

    $url=  $this->tailoringImg($img_path);
    return $url;
}
// 将微信下面的一行字切掉
function tailoringImg($url)
{
    $file_path =$url;
    $save_width = 390;
    $start_spot_x = 10;
    $start_spot_y = 15;
    $width = 260;
    $height = 255;
    if(file_exists($file_path) && is_readable($file_path))
    {
        //从字符串中的图像流新建一图像
        $src = imagecreatefromstring(file_get_contents($file_path));
        //保存图片的高
        $save_height = round($save_width*$height/$width);
        //根据要保存的宽和高创建图片
        $new_image = imagecreatetruecolor($save_width, $save_height);
        //生成最后的图片
        imagecopyresampled($new_image, $src, 0, 0, $start_spot_x, $start_spot_y, $save_width, $save_height, $width, $height);
        //直接展示
        $rul= "./qrcode/".time().rand(1000,9999).".jpg";
        imagejpeg($new_image,$rul);
        imagedestroy($new_image);
        $url=substr($rul,1);
        return $url;
    }
    else
    {
        echo ‘文件查看失败‘;//记录日志
    }
}
public function makeRequest($url, $params = array(), $expire = 0, $extend = array(), $hostIp = ‘‘)
{
    if (empty($url)) {
        return array(‘code‘ => ‘100‘);
    }

    $_curl = curl_init();
    $_header = array(
        ‘Accept-Language: zh-CN‘,
        ‘Connection: Keep-Alive‘,
        ‘Cache-Control: no-cache‘
    );
    // 方便直接访问要设置host的地址
    if (!empty($hostIp)) {
        $urlInfo = parse_url($url);
        if (empty($urlInfo[‘host‘])) {
            $urlInfo[‘host‘] = substr(DOMAIN, 7, -1);
            $url = "http://{$hostIp}{$url}";
        } else {
            $url = str_replace($urlInfo[‘host‘], $hostIp, $url);
        }
        $_header[] = "Host: {$urlInfo[‘host‘]}";
    }

    // 只要第二个参数传了值之后，就是POST的
    if (!empty($params)) {
        curl_setopt($_curl, CURLOPT_POSTFIELDS, http_build_query($params));
        curl_setopt($_curl, CURLOPT_POST, true);
    }

    if (substr($url, 0, 8) == ‘https://‘) {
        curl_setopt($_curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($_curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    }
    curl_setopt($_curl, CURLOPT_URL, $url);
    curl_setopt($_curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($_curl, CURLOPT_USERAGENT, ‘API PHP CURL‘);
    curl_setopt($_curl, CURLOPT_HTTPHEADER, $_header);

    if ($expire > 0) {
        curl_setopt($_curl, CURLOPT_TIMEOUT, $expire); // 处理超时时间
        curl_setopt($_curl, CURLOPT_CONNECTTIMEOUT, $expire); // 建立连接超时时间
    }

    // 额外的配置
    if (!empty($extend)) {
        curl_setopt_array($_curl, $extend);
    }

    $result[‘result‘] = curl_exec($_curl);
    $result[‘code‘] = curl_getinfo($_curl, CURLINFO_HTTP_CODE);
    $result[‘info‘] = curl_getinfo($_curl);
    if ($result[‘result‘] === false) {
        $result[‘result‘] = curl_error($_curl);
        $result[‘code‘] = -curl_errno($_curl);
    }

    curl_close($_curl);
    return $result;
}

用户生成微信二维码，微信下面的一行字切掉