批量显示生成的二维码

class IndexController extends Controller {
    public function index(){

    }

    public function create_code($length=10){
        $code = array();
        for($i=0;$i<=$length;$i++){
            $code[$i] = $this->create_noncestr();
        }
        return $code;
    }

    public function draw(){
        
        $length = 6;
        $code = $this->create_code($length);
        //$code = var_dump($code);
        foreach($code as $v){
            $url = 'http://www.zrl.space/zrl_gra/index.php/App/index/experience?code='.$v;
            echo '<img src="'.__CONTROLLER__.'/drawPng/url/'.$url.'">','<br/>';//调用drawPng方法
        }

    }
    public function drawPng($url){
        Vendor("phpqrcode.phpqrcode");
        // 纠错级别：L、M、Q、H
        $level = 'L';
        // 点的大小：1到10,用于手机端4
        $size = 4;
        // 下面注释了把二维码图片保存到本地的代码,如果要保存图片,用$fileName替换第二个参数false
        $path = "images/";
        // 生成的文件名
        //$fileName = $path.$size.'.png';
        QRcode::png($url, false, $level, $size);
        $pic = "$v.png";
        echo $pic;
    }
    

    public function create_noncestr($length=16){
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = '';
        for($i=0;$i<$length;$i++){
            $str.=substr($chars,mt_rand(0,strlen($chars)-1),1);
        }
        return $str;
    }
}