php将oss，七牛云等第三方网络图片转为base64格式返回给客户端！

function master_imgUrl_base64($url){
    if($url){
        $header = array('User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0','Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3','Accept-Encoding: gzip, deflate',);
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
//        curl_setopt($curl, CURLOPT_ENCODING, 'gzip');
        curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
        $data = curl_exec($curl);
        $code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        curl_close($curl);
        if ($code == 200) {//把URL格式的图片转成base64_encode格式的！
            $imgBase64Code = "data:image/jpeg;base64," . base64_encode($data);
            return $imgBase64Code;
        }else{
            return false;
        }
    }else{
        return false;
    }
}