/**
     * 網路圖片轉換到本地並轉換成base64位
     * @param $url
     * @return string
     */
    public function imgzhuanhuan($url)
    {
        //網路圖片路徑
//        $url='https://img.jinse.com/1435941_small.png';
        //獲取檔案字尾
        $type = substr($url, strrpos($url, ".")+1);
        //本地路徑
        $path=public_path().'/images/'.time
 
().'.png';
        //反斜槓\替換為/
        $path=str_replace('\\','/',$path);

        //網上圖片儲存到本地
        $paths=$this->curl_file_get_contents($url, $path);
        //轉換成base64位
        $base64_image=$this->base64EncodeImage($paths);
        //刪除本地圖片
        @unlink($paths);
        return $base64_image;
    }

    
 
//這裡的path是我再本地專案中的臨時儲存路徑：'upload/pictrue/xxx.png'
    //這個路徑是要提前建立的，類似於一個空的模板，然後通過curl把二進位制的圖片流寫進去
    //$url是網路圖片的地址
    public function curl_file_get_contents($url, $path)
    {
        $hander = curl_init();
        $fp = fopen($path, 'wb');
        curl_setopt($hander, CURLOPT_URL, $url);
        curl_setopt(
 
$hander, CURLOPT_FILE, $fp);
        curl_setopt($hander, CURLOPT_HEADER, 0);
        curl_setopt($hander, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($hander, CURLOPT_TIMEOUT, 60);
        curl_exec($hander);
        curl_close($hander);
        fclose($fp);
        return $path;
    }


    public function base64EncodeImage ($image_file) {
        $base64_image = '';
        $image_info = getimagesize($image_file);
        $image_data = fread(fopen($image_file, 'r'), filesize($image_file));
        $base64_image = 'data:' . $image_info['mime'] . ';base64,' . chunk_split(base64_encode($image_data));
        return $base64_image;
    }