App\Controller\Page::vcode PHP Method

    function vcode()
    {
        $this->session->start();
        $this->http->header('Content-Type', 'image/jpeg');
        $verifyCode = Swoole\Image::verifycode_chinese('/usr/share/fonts/truetype/wqy/wqy-microhei.ttc');
        //        debug($verifyCode);
        //        $verifyCode = Swoole\Image::verifycode_gd();
        //        $verifyCode = Swoole\Image::verifycode_imagick();
        $_SESSION['vcode'] = $verifyCode['code'];
        return $verifyCode['image'];
    }