项目中使用的图片上传方法，base64存本地

 //生成健康报告
    public function uploadJkbg(Request $r) {
        $data = $r->all();
        $jkbg['jkbg_ctime'] = time();
        $jkbg['jkbg_aid'] = \Auth::user()->id;
        $jkbg['jkbg_id'] = str_random(6) . mt_rand(100000, 999999);
        //演示数据
//        $data['jkbg_pic'] = array(0=>$base64);
        //上传图片到服务器 返回路径
        if(!empty($data['jkbg_pic'])){
            $pic_arr = $this->uploadBaseIma($data['jkbg_pic']); //这一步把图片存入 参数是图片base64 数组格式
        }else{
            $pic_arr = array();
        }
        $jkbg['jkbg_pic'] = json_encode($pic_arr);
        //添加报告
        \DB::beginTransaction();
        $result = \DB::table('dxjk_jkbg')->insert($jkbg);
        if(!$result){
            \DB::rollback();
            \DB::commit();
            return ['code' => 1001, 'data' => ['message' => '上传报告失败']];
        }
        //修改上传状态
        $ress = \DB::table('dxjk_admin')->where('id',$jkbg['jkbg_aid'])->update(['admin_status' => 3]);
        \DB::commit();
        return ['code' => 1000, 'data' => ['message' => '上传报告成功']];

    }

//处理图片信息 返回对应的路径
public function uploadBaseIma($imgArr){
    $result = array();
    //将路径直接设置在uploads下
    if($imgArr){
        foreach($imgArr as $k => $v){
            if($v){
                $address = $this->baseChangeImg($v);
                $result[$k] = $address;
            }else {
                return array();
            }
        }
        return $result;
    }
}

//base64转化为本地图片
public function baseChangeImg($base)
{
    //匹配出图片的格式
    if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base, $result)) {
        $type = $result[2];
        $path = '/base' . date('Ymd', time()) . "/";
        $new_file = public_path('uploads') . $path;
        if (!file_exists($new_file)) {
            //检查是否有该文件夹，如果没有就创建，并给予最高权限
            mkdir($new_file, 0700);
        }
        $name = uniqid() . ".{$type}";
        $new_file = $new_file . $name;
        if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $base)))) {
            return $path . $name;
        } else {
            return false;
        }
    }
}