composer require qiniu/php-sdk

<?php
/**
 * Created by PhpStorm.
 * User: xieming
 * Date: 2017/5/27
 * Time: 20:05
 */
namespace app\index\model;

use think\Model;
use Qiniu\Auth;
use Qiniu\Storage\UploadManager;

class Upload extends Model{
    private $AccessKey;
    private $SecretKey;
    private $bucket;
    private $auth;
    function __construct()
    {
        parent::__construct();
        $this->AccessKey=config('qiniu.AccessKey');
        $this->SecretKey=config('qiniu.SecretKey');
        $this->bucket=config('qiniu.bucket');
        vendor('qiniu.php-sdk.autoload');
        $this->auth=new Auth($this->AccessKey,$this->SecretKey);
    }

    /**
     * @description 七牛上传文件
     * @param string $fileName 上传文件的name值
     * @param string $bucket 上传至七牛的指定空间
     * @return array 上传结果信息
     */
    public function upload($fileName='',$bucket=''){

        //文件获取、处理
        $file = request()->file($fileName);

        // 上传文件的本地路径
        $filePath = $file->getRealPath();

        //文件后缀
        $extension = pathinfo($file->getInfo('name'), PATHINFO_EXTENSION);

        //获取七牛token
        $bucket= empty($bucket) ? $this->bucket : $bucket;
        $token=$this->auth->uploadToken($bucket);

        //上传到七牛后保存的文件名
        $key = time().rand(0, 9999).'.'.$extension;
        
        //初始化UploadManager对象
        $uploadManager = new UploadManager();
        
        //文件上传
        list($result, $error) = $uploadManager->putFile($token, $key, $filePath);
        if ($error !== null) {
            return ['errNo'=>1,'errMsg'=>'','data'=>''];
        } else {
            return ['errNo'=>0,'data'=>['bucket'=>$this->bucket,'key'=>$key];
        }
    }

    /**
     * 获取私有空间或使用了原图保护功能的图片文件地址
     * @param string $url 格式：http://domain/key[文件名]?e=时间戳
     * @return string 可访问的url地址：http://domain/key[文件名]?e=时间戳&token='token'
     */
    public function getSignedUrl($url){
        $signedUrl = $this->auth->privateDownloadUrl($url);
        //该url地址需要验证是否可访问。
        return $signedUrl;
    }
}