Cloud Storage Client - Class Bucket (1.30.3)

Reference documentation and code samples for the Cloud Storage Client class Bucket.

Buckets are the basic containers that hold your data. Everything that you store in Google Cloud Storage must be contained in a bucket.

Example:

use Google\Cloud\Storage\StorageClient;

$storage = new StorageClient();

$bucket = $storage->bucket('my-bucket');

Methods

__construct

Parameters
Name	Description
`connection`	`Google\Cloud\Storage\Connection\ConnectionInterface` Represents a connection to Cloud Storage.
`name`	`string` The bucket's name.
`info`	`array` [optional] The bucket's metadata.

acl

Configure ACL for this bucket.

Example:

$acl = $bucket->acl();

Returns
Type	Description
`Google\Cloud\Storage\Acl`	An ACL instance configured to handle the bucket's access control policies.

defaultAcl

Configure default object ACL for this bucket.

Example:

$acl = $bucket->defaultAcl();

Returns
Type	Description
`Google\Cloud\Storage\Acl`	An ACL instance configured to handle the bucket's default object access control policies.

exists

Check whether or not the bucket exists.

Example:

if ($bucket->exists()) {
    echo 'Bucket exists!';
}

Parameter
Name	Description
`options`	`array` Configuration options.

Returns
Type	Description
`bool`

upload

Upload your data in a simple fashion. Uploads will default to being resumable if the file size is greater than 5mb.

Example:

$object = $bucket->upload(
    fopen(__DIR__ . '/image.jpg', 'r')
);

// Upload an object in a resumable fashion while setting a new name for
// the object and including the content language.
$options = [
    'resumable' => true,
    'name' => '/images/new-name.jpg',
    'metadata' => [
        'contentLanguage' => 'en'
    ]
];

$object = $bucket->upload(
    fopen(__DIR__ . '/image.jpg', 'r'),
    $options
);

// Upload an object with a customer-supplied encryption key.
$key = base64_encode(openssl_random_pseudo_bytes(32)); // Make sure to remember your key.

$object = $bucket->upload(
    fopen(__DIR__ . '/image.jpg', 'r'),
    ['encryptionKey' => $key]
);

// Upload an object utilizing an encryption key managed by the Cloud Key Management Service (KMS).
$object = $bucket->upload(
    fopen(__DIR__ . '/image.jpg', 'r'),
    [
        'metadata' => [
            'kmsKeyName' => 'projects/my-project/locations/kr-location/keyRings/my-kr/cryptoKeys/my-key'
        ]
    ]
);

Parameters
Name	Description
`data`	`string\|resource\|Psr\Http\Message\StreamInterface\|null` The data to be uploaded.
`options`	`array` Configuration options.
`↳ name`	`string` The name of the destination. Required when data is of type string or null.
`↳ resumable`	`bool` Indicates whether or not the upload will be performed in a resumable fashion.
`↳ validate`	`bool\|string` Indicates whether or not validation will be applied using md5 or crc32c hashing functionality. If enabled, and the calculated hash does not match that of the upstream server, the upload will be rejected. Available options are `true`, `false`, `md5` and `crc32`. If true, either md5 or crc32c will be chosen based on your platform. If false, no validation hash will be sent. Choose either `md5` or `crc32` to force a hash method regardless of performance implications. In PHP versions earlier than 7.4, performance will be very adversely impacted by using crc32c unless you install the `crc32c` PHP extension. Defaults to `true`.
`↳ chunkSize`	`int` If provided the upload will be done in chunks. The size must be in multiples of 262144 bytes. With chunking you have increased reliability at the risk of higher overhead. It is recommended to not use chunking.
`↳ uploadProgressCallback`	`callable` If provided together with $resumable == true the given callable function/method will be called after each successfully uploaded chunk. The callable function/method will receive the number of uploaded bytes after each uploaded chunk as a parameter to this callable. It's useful if you want to create a progress bar when using resumable upload type together with $chunkSize parameter. If $chunkSize is not set the callable function/method will be called only once after the successful file upload.
`↳ predefinedAcl`	`string` Predefined ACL to apply to the object. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ metadata`	`array` The full list of available options are outlined at the JSON API docs.
`↳ metadata`	`array` .metadata User-provided metadata, in key/value pairs.
`↳ encryptionKey`	`string` A base64 encoded AES-256 customer-supplied encryption key. If you would prefer to manage encryption utilizing the Cloud Key Management Service (KMS) please use the `$metadata.kmsKeyName` setting. Please note if using KMS the key ring must use the same location as the bucket.
`↳ encryptionKeySHA256`	`string` Base64 encoded SHA256 hash of the customer-supplied encryption key. This value will be calculated from the `encryptionKey` on your behalf if not provided, but for best performance it is recommended to pass in a cached version of the already calculated SHA.

Returns
Type	Description
`Google\Cloud\Storage\StorageObject`

uploadAsync

Asynchronously uploads an object.

Please note this method does not support resumable or streaming uploads.

Example:

$promise = $bucket->uploadAsync('Lorem Ipsum', ['name' => 'keyToData']);
$object = $promise->wait();

// Upload multiple objects to a bucket asynchronously.
$promises = [];
$objects = ['key1' => 'Lorem', 'key2' => 'Ipsum', 'key3' => 'Gypsum'];

foreach ($objects as $k => $v) {
    $promises[] = $bucket->uploadAsync($v, ['name' => $k])
        ->then(function (StorageObject $object) {
            echo $object->name() . PHP_EOL;
        }, function(\Exception $e) {
            throw new Exception('An error has occurred in the matrix.', null, $e);
        });
}

foreach ($promises as $promise) {
    $promise->wait();
}

Parameters
Name	Description
`data`	`string\|resource\|Psr\Http\Message\StreamInterface\|null` The data to be uploaded.
`options`	`array` Configuration options.
`↳ name`	`string` The name of the destination. Required when data is of type string or null.
`↳ validate`	`bool\|string` Indicates whether or not validation will be applied using md5 or crc32c hashing functionality. If enabled, and the calculated hash does not match that of the upstream server, the upload will be rejected. Available options are `true`, `false`, `md5` and `crc32`. If true, either md5 or crc32c will be chosen based on your platform. If false, no validation hash will be sent. Choose either `md5` or `crc32` to force a hash method regardless of performance implications. In PHP versions earlier than 7.4, performance will be very adversely impacted by using crc32c unless you install the `crc32c` PHP extension. Defaults to `true`.ß
`↳ predefinedAcl`	`string` Predefined ACL to apply to the object. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ metadata`	`array` The full list of available options are outlined at the JSON API docs.
`↳ metadata`	`array` .metadata User-provided metadata, in key/value pairs.
`↳ encryptionKey`	`string` A base64 encoded AES-256 customer-supplied encryption key. If you would prefer to manage encryption utilizing the Cloud Key Management Service (KMS) please use the `$metadata.kmsKeyName` setting. Please note if using KMS the key ring must use the same location as the bucket.
`↳ encryptionKeySHA256`	`string` Base64 encoded SHA256 hash of the customer-supplied encryption key. This value will be calculated from the `encryptionKey` on your behalf if not provided, but for best performance it is recommended to pass in a cached version of the already calculated SHA.

Returns
Type	Description
`GuzzleHttp\Promise\PromiseInterface<\google\cloud\storage\storageobject>`

getResumableUploader

Get a resumable uploader which can provide greater control over the upload process. This is recommended when dealing with large files where reliability is key.

Example:

$uploader = $bucket->getResumableUploader(
    fopen(__DIR__ . '/image.jpg', 'r')
);

try {
    $object = $uploader->upload();
} catch (GoogleException $ex) {
    $resumeUri = $uploader->getResumeUri();
    $object = $uploader->resume($resumeUri);
}

Parameters
Name	Description
`data`	`string\|resource\|Psr\Http\Message\StreamInterface\|null` The data to be uploaded.
`options`	`array` Configuration options.
`↳ name`	`string` The name of the destination. Required when data is of type string or null.
`↳ validate`	`bool` Indicates whether or not validation will be applied using md5 hashing functionality. If true and the calculated hash does not match that of the upstream server the upload will be rejected.
`↳ predefinedAcl`	`string` Predefined ACL to apply to the object. Acceptable values include `"authenticatedRead`", `"bucketOwnerFullControl`", `"bucketOwnerRead`", `"private`", `"projectPrivate`", and `"publicRead"`.
`↳ metadata`	`array` The available options for metadata are outlined at the JSON API docs.
`↳ encryptionKey`	`string` A base64 encoded AES-256 customer-supplied encryption key. If you would prefer to manage encryption utilizing the Cloud Key Management Service (KMS) please use the $metadata['kmsKeyName'] setting. Please note if using KMS the key ring must use the same location as the bucket.
`↳ encryptionKeySHA256`	`string` Base64 encoded SHA256 hash of the customer-supplied encryption key. This value will be calculated from the `encryptionKey` on your behalf if not provided, but for best performance it is recommended to pass in a cached version of the already calculated SHA.
`↳ uploadProgressCallback`	`callable` The given callable function/method will be called after each successfully uploaded chunk. The callable function/method will receive the number of uploaded bytes after each uploaded chunk as a parameter to this callable. It's useful if you want to create a progress bar when using resumable upload type together with $chunkSize parameter. If $chunkSize is not set the callable function/method will be called only once after the successful file upload.

Returns
Type	Description
`Google\Cloud\Core\Upload\ResumableUploader`

getStreamableUploader

Get a streamable uploader which can provide greater control over the upload process. This is useful for generating large files and uploading the contents in chunks.

Example:

$uploader = $bucket->getStreamableUploader(
    'initial contents',
    ['name' => 'data.txt']
);

// finish uploading the item
$uploader->upload();

Parameters
Name	Description
`data`	`string\|resource\|Psr\Http\Message\StreamInterface` The data to be uploaded.
`options`	`array` Configuration options.
`↳ name`	`string` The name of the destination. Required when data is of type string or null.
`↳ validate`	`bool` Indicates whether or not validation will be applied using md5 hashing functionality. If true and the calculated hash does not match that of the upstream server the upload will be rejected.
`↳ chunkSize`	`int` If provided the upload will be done in chunks. The size must be in multiples of 262144 bytes. With chunking you have increased reliability at the risk of higher overhead. It is recommended to not use chunking.
`↳ predefinedAcl`	`string` Predefined ACL to apply to the object. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ metadata`	`array` The available options for metadata are outlined at the JSON API docs.
`↳ encryptionKey`	`string` A base64 encoded AES-256 customer-supplied encryption key. If you would prefer to manage encryption utilizing the Cloud Key Management Service (KMS) please use the $metadata['kmsKeyName'] setting. Please note if using KMS the key ring must use the same location as the bucket.
`↳ encryptionKeySHA256`	`string` Base64 encoded SHA256 hash of the customer-supplied encryption key. This value will be calculated from the `encryptionKey` on your behalf if not provided, but for best performance it is recommended to pass in a cached version of the already calculated SHA.

Returns
Type	Description
`Google\Cloud\Core\Upload\StreamableUploader`

object

Lazily instantiates an object. There are no network requests made at this point. To see the operations that can be performed on an object please see Google\Cloud\Storage\StorageObject.

Example:

$object = $bucket->object('file.txt');

Parameters
Name	Description
`name`	`string` The name of the object to request.
`options`	`array` Configuration options.
`↳ generation`	`string` Request a specific revision of the object.
`↳ encryptionKey`	`string` A base64 encoded AES-256 customer-supplied encryption key. It will be neccesary to provide this when a key was used during the object's creation.
`↳ encryptionKeySHA256`	`string` Base64 encoded SHA256 hash of the customer-supplied encryption key. This value will be calculated from the `encryptionKey` on your behalf if not provided, but for best performance it is recommended to pass in a cached version of the already calculated SHA.

Returns
Type	Description
`Google\Cloud\Storage\StorageObject`

objects

Fetches all objects in the bucket.

Example:

// Get all objects beginning with the prefix 'photo'
$objects = $bucket->objects([
    'prefix' => 'photo',
    'fields' => 'items/name,nextPageToken'
]);

foreach ($objects as $object) {
    echo $object->name() . PHP_EOL;
}

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ delimiter`	`string` Returns results in a directory-like mode. Results will contain only objects whose names, aside from the prefix, do not contain delimiter. Objects whose names, aside from the prefix, contain delimiter will have their name, truncated after the delimiter, returned in prefixes. Duplicate prefixes are omitted.
`↳ maxResults`	`int` Maximum number of results to return per request. Defaults to `1000`.
`↳ resultLimit`	`int` Limit the number of results returned in total. Defaults to `0` (return all results).
`↳ pageToken`	`string` A previously-returned page token used to resume the loading of results from a specific point.
`↳ prefix`	`string` Filter results with this prefix.
`↳ projection`	`string` Determines which properties to return. May be either `"full"` or `"noAcl"`.
`↳ versions`	`bool` If true, lists all versions of an object as distinct results. Defaults to `false`.
`↳ fields`	`string` Selector which will cause the response to only return the specified fields.

Returns
Type	Description
`Google\Cloud\Storage\ObjectIterator<\google\cloud\storage\storageobject>`

createNotification

Create a Cloud PubSub notification.

Please note, the desired topic must be given the IAM role of "pubsub.publisher" from the service account associated with the project which contains the bucket you would like to receive notifications from. Please see the example below for a programmatic example of achieving this.

Example:

// Update the permissions on the desired topic prior to creating the
// notification.
use Google\Cloud\Core\Iam\PolicyBuilder;
use Google\Cloud\PubSub\PubSubClient;

$pubSub = new PubSubClient();
$topicName = 'my-topic';
$serviceAccountEmail = $storage->getServiceAccount();
$topic = $pubSub->topic($topicName);
$iam = $topic->iam();
$updatedPolicy = (new PolicyBuilder($iam->policy()))
    ->addBinding('roles/pubsub.publisher', [
        "serviceAccount:$serviceAccountEmail"
    ])
    ->result();
$iam->setPolicy($updatedPolicy);

$notification = $bucket->createNotification($topicName);

// Use a fully qualified topic name.
$notification = $bucket->createNotification('projects/my-project/topics/my-topic');

// Provide a Topic object from the Cloud PubSub component.
use Google\Cloud\PubSub\PubSubClient;

$pubSub = new PubSubClient();
$topic = $pubSub->topic('my-topic');
$notification = $bucket->createNotification($topic);

// Supplying event types to trigger the notifications.
$notification = $bucket->createNotification('my-topic', [
    'event_types' => [
        'OBJECT_DELETE',
        'OBJECT_METADATA_UPDATE'
    ]
]);

Parameters
Name	Description
`topic`	`string\|Google\Cloud\PubSub\Topic` The topic used to publish notifications.
`options`	`array` Configuration options.
`↳ custom_attributes`	`array` An optional list of additional attributes to attach to each Cloud PubSub message published for this notification subscription.
`↳ event_types`	`array` If present, only send notifications about listed event types. If empty, sent notifications for all event types. Acceptablue values include `"OBJECT_FINALIZE"`, `"OBJECT_METADATA_UPDATE"`, `"OBJECT_DELETE"` , `"OBJECT_ARCHIVE"`.
`↳ object_name_prefix`	`string` If present, only apply this notification configuration to object names that begin with this prefix.
`↳ payload_format`	`string` The desired content of the Payload. Acceptable values include `"JSON_API_V1"`, `"NONE"`. Defaults to `"JSON_API_V1"`.

Returns
Type	Description
`Google\Cloud\Storage\Notification`

notification

Lazily instantiates a notification. There are no network requests made at this point. To see the operations that can be performed on a notification please see Google\Cloud\Storage\Notification.

Example:

$notification = $bucket->notification('4582');

Parameter
Name	Description
`id`	`string` The ID of the notification to access.

Returns
Type	Description
`Google\Cloud\Storage\Notification`

notifications

Fetches all notifications associated with this bucket.

Example:

$notifications = $bucket->notifications();

foreach ($notifications as $notification) {
    echo $notification->id() . PHP_EOL;
}

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ resultLimit`	`int` Limit the number of results returned in total. Defaults to `0` (return all results).

Returns
Type	Description
`Google\Cloud\Core\Iterator\ItemIterator<\google\cloud\storage\notification>`

delete

Delete the bucket.

Example:

$bucket->delete();

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ ifMetagenerationMatch`	`string` If set, only deletes the bucket if its metageneration matches this value.
`↳ ifMetagenerationNotMatch`	`string` If set, only deletes the bucket if its metageneration does not match this value.

Returns
Type	Description
`void`

update

Update the bucket. Upon receiving a result the local bucket's data will be updated.

Example:

// Enable logging on an existing bucket.
$bucket->update([
    'logging' => [
        'logBucket' => 'myBucket',
        'logObjectPrefix' => 'prefix'
    ]
]);

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ ifMetagenerationMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration matches the given value.
`↳ ifMetagenerationNotMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration does not match the given value.
`↳ predefinedAcl`	`string` Predefined ACL to apply to the bucket. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ predefinedDefaultObjectAcl`	`string` Apply a predefined set of default object access controls to this bucket. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ projection`	`string` Determines which properties to return. May be either `"full"` or `"noAcl"`.
`↳ fields`	`string` Selector which will cause the response to only return the specified fields.
`↳ acl`	`array` Access controls on the bucket.
`↳ cors`	`array` The bucket's Cross-Origin Resource Sharing (CORS) configuration.
`↳ defaultObjectAcl`	`array` Default access controls to apply to new objects when no ACL is provided.
`↳ lifecycle`	`array\|Lifecycle` The bucket's lifecycle configuration.
`↳ logging`	`array` The bucket's logging configuration, which defines the destination bucket and optional name prefix for the current bucket's logs.
`↳ storageClass`	`string` The bucket's storage class. This defines how objects in the bucket are stored and determines the SLA and the cost of storage. Acceptable values include the following strings: `"STANDARD"`, `"NEARLINE"`, `"COLDLINE"` and `"ARCHIVE"`. Legacy values including `"MULTI_REGIONAL"`, `"REGIONAL"` and `"DURABLE_REDUCED_AVAILABILITY"` are also available, but should be avoided for new implementations. For more information, refer to the Storage Classes documentation. Defaults to `"STANDARD"`.
`↳ autoclass`	`array` The bucket's autoclass configuration. Buckets can have either StorageClass OLM rules or Autoclass, but not both. When Autoclass is enabled on a bucket, adding StorageClass OLM rules will result in failure.
`↳ versioning`	`array` The bucket's versioning configuration.
`↳ website`	`array` The bucket's website configuration.
`↳ billing`	`array` The bucket's billing configuration.
`↳ billing`	`bool` .requesterPays When `true`, requests to this bucket and objects within it must provide a project ID to which the request will be billed.
`↳ labels`	`array` The Bucket labels. Labels are represented as an array of keys and values. To remove an existing label, set its value to `null`.
`↳ encryption`	`array` Encryption configuration used by default for newly inserted objects.
`↳ encryption`	`string` .defaultKmsKeyName A Cloud KMS Key used to encrypt objects uploaded into this bucket. Should be in the format `projects/my-project/locations/kr-location/keyRings/my-kr/cryptoKeys/my-key`. Please note the KMS key ring must use the same location as the bucket.
`↳ defaultEventBasedHold`	`bool` When `true`, newly created objects in this bucket will be retained indefinitely until an event occurs, signified by the hold's release.
`↳ retentionPolicy`	`array` Defines the retention policy for a bucket. In order to lock a retention policy, please see Google\Cloud\Storage\Google\Cloud\Storage\Bucket::lockRetentionPolicy().
`↳ retentionPolicy`	`int` .retentionPeriod Specifies the duration that objects need to be retained, in seconds. Retention duration must be greater than zero and less than 100 years.
`↳ iamConfiguration`	`array` The bucket's IAM configuration.
`↳ iamConfiguration`	`bool` .bucketPolicyOnly.enabled this is an alias for $iamConfiguration.uniformBucketLevelAccess.
`↳ iamConfiguration`	`bool` .uniformBucketLevelAccess.enabled If set and true, access checks only use bucket-level IAM policies or above. When enabled, requests attempting to view or manipulate ACLs will fail with error code 400. NOTE: Before using Uniform bucket-level access, please review the feature documentation, as well as Should You Use uniform bucket-level access
`↳ iamConfiguration`	`string` .publicAccessPrevention The bucket's Public Access Prevention configuration. Currently, 'inherited' and 'enforced' are supported. defaults to `inherited`. For more details, see Public Access Prevention.

Returns
Type	Description
`array`

compose

Composes a set of objects into a single object.

Please note that all objects to be composed must come from the same bucket.

Example:

$sourceObjects = ['log1.txt', 'log2.txt'];
$singleObject = $bucket->compose($sourceObjects, 'combined-logs.txt');

// Use an instance of StorageObject.
$sourceObjects = [
    $bucket->object('log1.txt'),
    $bucket->object('log2.txt')
];

$singleObject = $bucket->compose($sourceObjects, 'combined-logs.txt');

Parameters
Name	Description
`sourceObjects`	`string[]\|array<Google\Cloud\Storage\StorageObject>` The objects to compose.
`name`	`string` The name of the composed object.
`options`	`array` Configuration options.
`↳ predefinedAcl`	`string` Predefined ACL to apply to the composed object. Acceptable values include, `"authenticatedRead"`, `"bucketOwnerFullControl"`, `"bucketOwnerRead"`, `"private"`, `"projectPrivate"`, and `"publicRead"`.
`↳ metadata`	`array` Metadata to apply to the composed object. The available options for metadata are outlined at the JSON API docs.
`↳ ifGenerationMatch`	`string` Makes the operation conditional on whether the object's current generation matches the given value.
`↳ ifMetagenerationMatch`	`string` Makes the operation conditional on whether the object's current metageneration matches the given value.

Returns
Type	Description
`Google\Cloud\Storage\StorageObject`

info

Retrieves the bucket's details. If no bucket data is cached a network request will be made to retrieve it.

Example:

$info = $bucket->info();
echo $info['location'];

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ ifMetagenerationMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration matches the given value.
`↳ ifMetagenerationNotMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration does not match the given value.
`↳ projection`	`string` Determines which properties to return. May be either `"full"` or `"noAcl"`.

Returns
Type	Description
`array`

reload

Triggers a network request to reload the bucket's details.

Example:

$bucket->reload();
$info = $bucket->info();
echo $info['location'];

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ ifMetagenerationMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration matches the given value.
`↳ ifMetagenerationNotMatch`	`string` Makes the return of the bucket metadata conditional on whether the bucket's current metageneration does not match the given value.
`↳ projection`	`string` Determines which properties to return. May be either `"full"` or `"noAcl"`.

Returns
Type	Description
`array`

name

Retrieves the bucket's name.

Example:

echo $bucket->name();

Returns
Type	Description
`string`

lifecycle

Retrieves a fresh lifecycle builder. If a lifecyle configuration already exists on the target bucket and this builder is used, it will fully replace the configuration with the rules provided by this builder.

This builder is intended to be used in tandem with Google\Cloud\Storage\Google\Cloud\Storage\StorageClient::createBucket() and Google\Cloud\Storage\Google\Cloud\Storage\Bucket::update().

Example:

use Google\Cloud\Storage\Bucket;

$lifecycle = Bucket::lifecycle()
    ->addDeleteRule([
        'age' => 50,
        'isLive' => true
    ]);
$bucket->update([
    'lifecycle' => $lifecycle
]);

Parameter
Name	Description
`lifecycle`	`array` [optional] A lifecycle configuration. Please see here for the expected structure.

Returns
Type	Description
`Google\Cloud\Storage\Lifecycle`

currentLifecycle

Retrieves a lifecycle builder preconfigured with the lifecycle rules that already exists on the bucket. Use this if you want to make updates to an existing configuration without removing existing rules, as would be the case when using Google\Cloud\Storage\Bucket::lifecycle().

This builder is intended to be used in tandem with Google\Cloud\Storage\Google\Cloud\Storage\StorageClient::createBucket() and Google\Cloud\Storage\Google\Cloud\Storage\Bucket::update().

Please note, this method may trigger a network request in order to fetch the existing lifecycle rules from the server.

Example:

$lifecycle = $bucket->currentLifecycle()
    ->addDeleteRule([
        'age' => 50,
        'isLive' => true
    ]);
$bucket->update([
    'lifecycle' => $lifecycle
]);

// Iterate over existing rules.
$lifecycle = $bucket->currentLifecycle();

foreach ($lifecycle as $rule) {
    print_r($rule);
}

Parameter
Name	Description
`options`	`array` [optional] Configuration options.

Returns
Type	Description
`Google\Cloud\Storage\Lifecycle`

isWritable

Returns whether the bucket with the given file prefix is writable.

Tries to create a temporary file as a resumable upload which will not be completed (and cleaned up by GCS).

Parameter
Name	Description
`file`	`string` [optional] File to try to write.

Returns
Type	Description
`bool`

iam

Manage the IAM policy for the current Bucket.

To request a policy with conditions, pass an array with '[requestedPolicyVersion => 3]' as argument to the policy() and reload() methods.

Example:

$iam = $bucket->iam();

// Returns the stored policy, or fetches the policy if none exists.
$policy = $iam->policy(['requestedPolicyVersion' => 3]);

// Fetches a policy from the server.
$policy = $iam->reload(['requestedPolicyVersion' => 3]);

Returns
Type	Description
`Google\Cloud\Core\Iam\Iam`

lockRetentionPolicy

Locks a provided retention policy on this bucket. Upon receiving a result, the local bucket's data will be updated.

Please note that in order for this call to succeed, the applicable metageneration value will need to be available. It can either be supplied explicitly through the ifMetagenerationMatch option or detected for you by ensuring a value is cached locally (by calling Google\Cloud\Storage\Google\Cloud\Storage\Bucket::reload() or Google\Cloud\Storage\Google\Cloud\Storage\Bucket::info(), for example).

Example:

// Set a retention policy.
$bucket->update([
    'retentionPolicy' => [
        'retentionPeriod' => 604800 // One week in seconds.
    ]
]);
// Lock in the policy.
$info = $bucket->lockRetentionPolicy();
$retentionPolicy = $info['retentionPolicy'];

// View the time from which the policy was enforced and effective. (RFC 3339 format)
echo $retentionPolicy['effectiveTime'] . PHP_EOL;

// View whether or not the retention policy is locked. This will be
// `true` after a successful call to `lockRetentionPolicy`.
echo $retentionPolicy['isLocked'];

Parameters
Name	Description
`options`	`array` Configuration options.
`↳ ifMetagenerationMatch`	`string` Only locks the retention policy if the bucket's metageneration matches this value. If not provided the locally cached metageneration value will be used, otherwise an exception will be thrown.

Returns
Type	Description
`array`

signedUrl

Create a Signed URL listing objects in this bucket.

Example:

$url = $bucket->signedUrl(time() + 3600);

// Use V4 Signing
$url = $bucket->signedUrl(time() + 3600, [
    'version' => 'v4'
]);

Parameters
Name	Description
`expires`	`Google\Cloud\Core\Timestamp\|DateTimeInterface\|int` Specifies when the URL will expire. May provide an instance of {@see \Google\Cloud\Storage\Google\Cloud\Core\Timestamp}, http://php.net/datetimeimmutable, or a UNIX timestamp as an integer.
`options`	`array` Configuration Options.
`↳ cname`	`string` The CNAME for the bucket, for instance `https://cdn.example.com`. Defaults to `https://storage.googleapis.com`.
`↳ contentMd5`	`string` The MD5 digest value in base64. If you provide this, the client must provide this HTTP header with this same value in its request. If provided, take care to always provide this value as a base64 encoded string.
`↳ contentType`	`string` If you provide this value, the client must provide this HTTP header set to the same value.
`↳ forceOpenssl`	`bool` If true, OpenSSL will be used regardless of whether phpseclib is available. Defaults to `false`.
`↳ headers`	`array` If additional headers are provided, the server will check to make sure that the client provides matching values. Provide headers as a key/value array, where the key is the header name, and the value is an array of header values. Headers with multiple values may provide values as a simple array, or a comma-separated string. For a reference of allowed headers, see Reference Headers. Header values will be trimmed of leading and trailing spaces, multiple spaces within values will be collapsed to a single space, and line breaks will be replaced by an empty string. V2 Signed URLs may not provide `x-goog-encryption-key` or `x-goog-encryption-key-sha256` headers.
`↳ keyFile`	`array` Keyfile data to use in place of the keyfile with which the client was constructed. If `$options.keyFilePath` is set, this option is ignored.
`↳ keyFilePath`	`string` A path to a valid keyfile to use in place of the keyfile with which the client was constructed.
`↳ scopes`	`string\|array` One or more authentication scopes to be used with a key file. This option is ignored unless `$options.keyFile` or `$options.keyFilePath` is set.
`↳ queryParams`	`array` Additional query parameters to be included as part of the signed URL query string. For allowed values, see Reference Headers.
`↳ version`	`string` One of "v2" or "v4". Defaults to* `"v2"`.

Returns
Type	Description
`string`

generateSignedPostPolicyV4

Create a signed upload policy for uploading objects.

This method generates and signs a policy document. You can use policy documents to allow visitors to a website to upload files to Google Cloud Storage without giving them direct write access.

Google Cloud PHP does not support v2 post policies.

Example:

$policy = $bucket->generateSignedPostPolicyV4($objectName, new \DateTime('tomorrow'), [
    'conditions' => [
        ['content-length-range', 0, 255]
    ],
    'fields' => [
         'x-goog-meta-hello' => 'world',
         'success_action_redirect' => 'https://google.com'
    ]
]);

echo '<form action="' . $policy['url'] . '" method="post" enctype="multipart/form-data">';
foreach ($policy['fields'] as $name => $value) {
    echo '<input type="hidden" name="' . $name . '" value="' . $value . '">';
}

echo 'Upload a file!<br>';
echo '<input type="file" name="file">';
echo '<button type="submit">Submit!</button>';
echo '</form>';

Parameters
Name	Description
`objectName`	`string` The path to the file in Google Cloud Storage, relative to the bucket.
`expires`	`Google\Cloud\Core\Timestamp\|DateTimeInterface\|int` Specifies when the URL will expire. May provide an instance of {@see \Google\Cloud\Storage\Google\Cloud\Core\Timestamp}, http://php.net/datetimeimmutable, or a UNIX timestamp as an integer.
`options`	`array` Configuration options
`↳ bucketBoundHostname`	`string` The hostname for the bucket, for instance `cdn.example.com`. May be used for Google Cloud Load Balancers or for custom bucket CNAMEs. Defaults to `storage.googleapis.com`.
`↳ conditions`	`array` A list of arrays containing policy matching conditions (e.g. `eq`, `starts-with`, `content-length-range`).
`↳ fields`	`array` Additional form fields (do not include `x-goog-signature`, `file`, `policy` or fields with an `x-ignore` prefix), given as key/value pairs.
`↳ forceOpenssl`	`bool` If true, OpenSSL will be used regardless of whether phpseclib is available. Defaults to `false`.
`↳ keyFile`	`array` Keyfile data to use in place of the keyfile with which the client was constructed. If `$options.keyFilePath` is set, this option is ignored.
`↳ keyFilePath`	`string` A path to a valid Keyfile to use in place of the keyfile with which the client was constructed.
`↳ scheme`	`string` Either `http` or `https`. Only used if a custom hostname is provided via `$options.bucketBoundHostname`. If a custom bucketBoundHostname is provided, defaults to `http`. In all other cases, defaults to `https`.
`↳ scopes`	`string\|array` One or more authentication scopes to be used with a key file. This option is ignored unless `$options.keyFile` or `$options.keyFilePath` is set.
`↳ virtualHostedStyle`	`bool` If `true`, URL will be of form `mybucket.storage.googleapis.com`. If `false`, `storage.googleapis.com/mybucket`. Defaults to `false`.

Returns
Type	Description
`array`	An associative array, containing (string) `uri` and (array) `fields` keys.

Constants

NOTIFICATION_TEMPLATE

Value: '//pubsub.googleapis.com/%s'

TOPIC_TEMPLATE

Value: 'projects/%s/topics/%s'

TOPIC_REGEX

Value: '/projects\\/[^\\/]*\\/topics\\/(.*)/'