# 查看生命周期规则
![](https://support.huaweicloud.com/sdk-php-devg-obs/public_sys-resources/notice_3.0-zh-cn.png)
开发过程中，您有任何问题可以在GitHub上[提交issue](https://github.com/huaweicloud/huaweicloud-sdk-php-obs/issues)，或者在[华为云对象存储服务论坛](https://bbs.huaweicloud.com/forum/forum-620-1.html)中发帖求助。[接口参考文档](https://support.huaweicloud.com/api-obs_php_sdk_api_zh/obs_38_0001.html)详细介绍了每个接口的参数和使用方法。
您可以通过ObsClient-\>getBucketLifecycle查看桶的生命周期规则。
本示例用于查看桶名为"bucketname"的生命周期规则。
代码示例如下所示:
```
<?php
// 引入依赖库
require 'vendor/autoload.php';
// 使用源码安装时引入SDK代码库
// require 'obs-autoloader.php';
// 声明命名空间
use Obs\ObsClient;
use Obs\ObsException;
// 创建ObsClient实例
$obsClient = new ObsClient([ 
    //推荐通过环境变量获取访问密钥AK/SK，这里也可以使用其他外部引入方式传入，如果使用硬编码可能会存在泄露风险。
    //您可以登录访问管理控制台获取访问密钥AK/SK，获取方式请参见https://support.huaweicloud.com/usermanual-ca/ca_01_0003.html
    'key' => getenv('ACCESS_KEY_ID'),
    'secret' => getenv('SECRET_ACCESS_KEY'),
    'endpoint' => 'https://your-endpoint',
]);
try {
    // 设置桶生命周期
    $resp = $obsClient->setBucketLifecycle([ 
       'Bucket' => 'bucketname' 
    ]);
    printf("RequestId:%s\n",$resp['RequestId']);
    if ($resp['StatusCode'] < 300) {
        foreach ($resp['Rules'] as $index => $rule) {
           printf("Rules[%d]\n", $index + 1);
           printf("ID:%s\n", $rule['ID']);
           printf("Prefix:%s\n", $rule['Prefix']);
           printf("Status:%s\n", $rule['Status']);
           foreach ($rule['Transitions'] as $i => $transition) {
               if (!empty($rule['Transitions'])) {        
                   printf("[Transitions][$i][StorageClass]:%s\n", $transition['StorageClass']);
                   if (isset($transition['Date'])) {
                        printf("[Transitions][$i][Date]:%s\n", $transition['Date']);
                    }
                    if (isset($transition['Days'])) {
                        printf("[Transitions][$i][Days]:%s\n", $transition['Days']);
                    }
                }
            }
            if (isset($rule['Expiration']['Days'])) {
                printf("Expiration[Days]:%s\n", $rule['Expiration']['Days']);
            }
            if (isset($rule['Expiration']['Date'])) {
                printf("Expiration[Date]:%s\n", $rule['Expiration']['Date']);
            }
            foreach ($rule['NoncurrentVersionTransitions'] as $i => $noncurrentVersionTransition) {
                printf("[NoncurrentVersionTransitions][$i][NoncurrentDays]:%d,[NoncurrentVersionTransitions][$i][StorageClass]:%s\n", $noncurrentVersionTransition['NoncurrentDays'], $noncurrentVersionTransition['StorageClass']);
            }
            if (isset($rule['NoncurrentVersionExpiration'])) { 
                printf("NoncurrentVersionExpiration[NoncurrentDays]:%s\n", $rule['NoncurrentVersionExpiration']['NoncurrentDays']);
            }
        }
    }
} catch (ObsException $e) {
    // 操作失败，获取详细异常信息
    printf("SetBucketLifecycleFailed: Status:%d, Code:%s, Message:%s\n",
         $e->getStatusCode(), $e->getExceptionCode(), $e->getExceptionMessage());
} finally {
    // 关闭ObsClient，释放资源
    $obsClient->close();
}
```
![](https://support.huaweicloud.com/sdk-php-devg-obs/public_sys-resources/note_3.0-zh-cn.png)
- 查看桶生命周期规则过程中返回的错误码含义、问题原因及处理措施可参考[SDK错误码](https://support.huaweicloud.com/sdk-php-devg-obs/obs_28_1602.html)。