<?php

　　　　  /**
         * 加载s3客户端
         * @return string
         */
        function AWS_S3Client(){
            $ACCESS_KEY_ID = ‘你的s3 ID‘;
            $SECRET_ACCESS_KEY = ‘你的s3 秘钥‘;
            $credentials = new Aws\Credentials\Credentials($ACCESS_KEY_ID, $SECRET_ACCESS_KEY);
            return new Aws\S3\S3Client([
                ‘version‘ => ‘latest‘,
                ‘region‘ => ‘eu-central-1‘,//节点
                ‘credentials‘ => $credentials,
                //‘debug‘   => true
            ]);
        }


        /**
         * AWS S3上传文件
         * @param string $file 文件相对路径
         * @param string $fileName 上传后的文件名称
         * @param int $type 1使用断点续传，0不使用
         * @param bool $publicRead 是否开放访问
         * @return array $path
         */
        function S3FileUpload($file = ‘‘, $fileName = ‘‘, $type = 0, $publicRead = false)
        {
            $s3Client = AWS_S3Client();
            $bucket = ‘yourBucketName‘;//你的存储桶名称
            $source = FILE_UPLOAD . $file;//$source 需要绝对路径 注意更换成自己的目录配置
            $fileName = $fileName ? $fileName : $file;
            $config = [
                ‘bucket‘ => $bucket, ‘key‘ => $fileName,//这里如果是相对路径 如 test/img/1.png 会自动创建目录 如果是绝对路径则直接上传到指定的存储桶中

            ];
            //是否开放访问
            if ($publicRead) {
                $config[‘ACL‘] = ‘public-read‘;
            }
            $uploader = new Aws\S3\MultipartUploader($s3Client, $source, $config);
            $code = 0;
            $message = ‘‘;
            if ($type == 1) {
                //在分段上传过程中发生错误,重新开始未完成的上传。
                do {
                    try {
                        $result = $uploader->upload();
                    } catch (Aws\Exception\MultipartUploadException $e) {
                        $uploader = new Aws\S3\MultipartUploader($s3Client, $source, [
                            ‘state‘ => $e->getState(),
                        ]);
                    }
                } while (!isset($result));
                $code = 1;
                $message = urldecode($result[‘ObjectURL‘]);
            } else {
                try {
                    $result = $uploader->upload();
                    $code = 1;
                    $message = urldecode($result[‘ObjectURL‘]);
                } catch (Aws\Exception\MultipartUploadException $e) {
                    $message = $e->getMessage();
                }
            }

            return [‘code‘ => $code, ‘message‘ => $message];
        }

        /**
         * 生成AWS S3下载文件url地址
         * @param string $file 文件相对地址 如:test/img/1.png
         * @param string $expires 授权时间
         * @return string
         */
        function S3FileDownload($file, $expires = ‘+10 minutes‘)
        {
            $s3Client = AWS_S3Client();
            $cmd = $s3Client->getCommand(‘GetObject‘, [
                ‘Bucket‘ => ‘你的存储桶名称‘, ‘Key‘ => $file //相对地址
            ]);

            $request = $s3Client->createPresignedRequest($cmd, $expires);
            //创建预签名 URL
            $presignedUrl = (string)$request->getUri();
            return $presignedUrl;
        }



?>