Help Center/ Object Storage Service/ SDK Reference/ PHP/ Bucket APIs/ Basic Operations/ Storage Class
Updated on 2026-08-03 GMT+08:00
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Storage Class

If you have any questions during development, post them on the Issues page of GitHub. For details about parameters and usage of each API, see API Reference.

OBS allows you to set storage classes for buckets. The storage class of an object defaults to be that of its residing bucket. Different storage classes meet different needs for storage performance and costs. The following table lists the available storage classes.

Storage Class

Description

Value in OBS PHP SDK

OBS Standard

Features low access latency and high throughput and is used for storing massive, frequently accessed (multiple times a month) or small objects (< 1 MB) requiring quick response.

ObsClient::StorageClassStandard

OBS Infrequent Access

Used for storing data that is semi-frequently accessed (fewer than 12 times a year) but is instantly available when needed.

ObsClient::StorageClassWarm

OBS Archive

Used for storing rarely accessed (once a year) data.

ObsClient::StorageClassCold

For more information, see Bucket Storage Classes.

Setting the Storage Class for a Bucket

You can call ObsClient->setBucketStoragePolicy to set the storage class for a bucket. Sample code is as follows:

<?php

// Import the dependency library.
require 'vendor/autoload.php';
// Import the SDK code library during the installation with source code.
// require 'obs-autoloader.php';
// Declare the namespace.
use Obs\ObsClient;
// Create an ObsClient instance.
$obsClient = new ObsClient ( [ 
      //Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
      //Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
      'key' => getenv('ACCESS_KEY_ID'),
      'secret' => getenv('SECRET_ACCESS_KEY'),
      'endpoint' => 'https://your-endpoint'
] );

$resp = $obsClient->setBucketStoragePolicy([
       'Bucket' => 'bucketname',
       'StorageClass' => ObsClient::StorageClassWarm
]);

printf("RequestId:%s\n",$resp['RequestId']);

Use the StorageClass parameter to set the storage class for a bucket.

Obtaining the Storage Class of a Bucket

You can call ObsClient->getBucketStoragePolicy to obtain the storage class of a bucket. Sample code is as follows:

<?php

// Import the dependency library.
require 'vendor/autoload.php';
// Import the SDK code library during the installation with source code.
// require 'obs-autoloader.php';
// Declare the namespace.
use Obs\ObsClient;
// Create an ObsClient instance.
$obsClient = new ObsClient ( [ 
      //Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
      //Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
      'key' => getenv('ACCESS_KEY_ID'),
      'secret' => getenv('SECRET_ACCESS_KEY'),
      'endpoint' => 'https://your-endpoint'
] );

$resp = $obsClient->getBucketStoragePolicy([
       'Bucket' => 'bucketname'
]);

printf("RequestId:%s\n",$resp['RequestId']);
printf("StorageClass:%s\n",$resp['StorageClass']);
Parent topic: Basic Operations