Cloud Firestore Client - Class FirestoreClient (1.28.0)

Reference documentation and code samples for the Cloud Firestore Client class FirestoreClient.

Cloud Firestore is a flexible, scalable, realtime database for mobile, web, and server development.

In production environments, it is highly recommended that you make use of the Protobuf PHP extension for improved performance. Protobuf can be installed via PECL.

$ pecl install protobuf

To enable the Google Cloud Firestore Emulator, set the FIRESTORE_EMULATOR_HOST to the value provided by the gcloud command.

Please note that Google Cloud PHP currently does not support IPv6 hostnames. If the Firestore emulator provides a IPv6 hostname, or a comma-separated list of both IPv6 and IPv4 names, be sure to set the environment variable to only an IPv4 address. The equivalent of [::1]:8080, for instance, would be 127.0.0.1:8080.

Example:

use Google\Cloud\Firestore\FirestoreClient;

$firestore = new FirestoreClient();

// Using the Firestore Emulator
use Google\Cloud\Firestore\FirestoreClient;

// Be sure to use the port specified when starting the emulator.
// `8900` is used as an example only.
putenv('FIRESTORE_EMULATOR_HOST=localhost:8900');

$firestore = new FirestoreClient();

Methods

__construct

Create a Firestore client. Please note that this client requires the gRPC extension.

Parameters
Name	Description
`config`	`array` Configuration Options.
`↳ apiEndpoint`	`string` A hostname with optional port to use in place of the service's default endpoint.
`↳ projectId`	`string` The project ID from the Google Developer's Console.
`↳ authCache`	`CacheItemPoolInterface` A cache for storing access tokens. Defaults to a simple in memory implementation.
`↳ authCacheOptions`	`array` Cache configuration options.
`↳ authHttpHandler`	`callable` A handler used to deliver Psr7 requests specifically for authentication.
`↳ httpHandler`	`callable` A handler used to deliver Psr7 requests. Only valid for requests sent over REST.
`↳ keyFile`	`array` The contents of the service account credentials .json file retrieved from the Google Developer's Console. Ex: `json_decode(file_get_contents($path), true)`.
`↳ keyFilePath`	`string` The full path to your service account credentials .json file retrieved from the Google Developers Console.
`↳ retries`	`int` Number of retries for a failed request. Defaults to `3`.
`↳ scopes`	`array` Scopes to be used for the request.
`↳ quotaProject`	`string` Specifies a user project to bill for access charges associated with the request.
`↳ returnInt64AsObject`	`bool` If true, 64 bit integers will be returned as a Google\Cloud\Firestore\Google\Cloud\Core\Int64 object for 32 bit platform compatibility. Defaults to false.

batch

Get a Batch Writer

The Google\Cloud\Firestore\Google\Cloud\Firestore\WriteBatch allows more performant multi-document, atomic updates.

Example:

$batch = $firestore->batch();

Returns
Type	Description
`Google\Cloud\Firestore\WriteBatch`

bulkWriter

Get a Bulk Writer

Google\Cloud\Firestore\Google\Cloud\Firestore\BulkWriter allows scheduling multiple writes with auto-retries in batches. Please note:

This method is blocking and may execute many sequential batch write requests.
Gradually ramps up writes as specified by the 500/50/5 rule.
Does not guarantee the order of writes.
Accepts unique document references only. Read more: Ramping up traffic

Example:

$batch = $firestore->bulkWriter();

Parameters
Name	Description
`options`	`array` Configuration options. `Please note that the default values are experiementally derived after performance evaluations. The underlying constants may change in backwards- incompatible ways. Please use with caution, and test thoroughly when upgrading.`
`↳ maxBatchSize`	`int` Maximum number of requests per batch. Defaults to `20`.
`↳ greedilySend`	`bool` Flag to indicate whether BulkWriter greedily sends batches. Defaults to `true`.
`↳ isThrottlingEnabled`	`bool` Flag to indicate whether rate of sending writes can be throttled. Defaults to `true`.
`↳ initialOpsPerSecond`	`int` Initial number of operations per second. Defaults to `20`.
`↳ maxOpsPerSecond`	`int` Maximum number of operations per second. Defaults to `500`.
`↳ isRetryable`	`callable` Default retry handler for individial writes status code to be retried. Should accept error code and return true if retryable.

Returns
Type	Description
`Google\Cloud\Firestore\BulkWriter`

collection

Lazily instantiate a Collection reference.

Collections hold Firestore documents. Collections cannot be created or deleted directly - they exist only as implicit namespaces. Once no child documents remain in a collection, it ceases to exist.

Example:

$collection = $firestore->collection('users');

Parameter
Name	Description
`name`	`string` The name of the collection.

Returns
Type	Description
`Google\Cloud\Firestore\CollectionReference`

collections

List root-level collections in the database.

Example:

$collections = $firestore->collections();

Parameters
Name	Description
`options`	`array` Configuration options
`↳ pageSize`	`int` Maximum number of results to return per request.
`↳ 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.

Returns
Type	Description
`Google\Cloud\Core\Iterator\ItemIterator<\google\cloud\firestore\collectionreference>`

document

Get a reference to a Firestore document.

Example:

$document = $firestore->document('users/john');

Parameter
Name	Description
`name`	`string` The document name or a path, relative to the database.

Returns
Type	Description
`Google\Cloud\Firestore\DocumentReference`

documents

Get a list of documents by their path.

The number of results generated will be equal to the number of documents requested, except in case of error.

Note that this method will always return instances of Google\Cloud\Firestore\Google\Cloud\Firestore\DocumentSnapshot, even if the documents requested do not exist. It is highly recommended that you check for existence before accessing document data.

Example:

$documents = $firestore->documents([
    'users/john',
    'users/dave'
]);

// To check whether a given document exists, use `DocumentSnapshot::exists()`.
$documents = $firestore->documents([
    'users/deleted-user'
]);

foreach ($documents as $document) {
    if (!$document->exists()) {
        echo $document->id() . ' Does Not Exist';
    }
}

Parameters
Name	Description
`paths`	`string[]\|array<Google\Cloud\Firestore\DocumentReference>` Any combination of string paths or DocumentReference instances.
`options`	`array` Configuration options.

Returns
Type	Description
`array<Google\Cloud\Firestore\DocumentSnapshot>`

collectionGroup

Creates a new Query which includes all documents that are contained in a collection or subcollection with the given collection ID.

A collection group query with a collection ID of foo will return documents from /foo and /abc/dce/foo, but not /foo/abc/dce.

Example:

$query = $firestore->collectionGroup('users');
$querySnapshot = $query->documents();

echo sprintf('Found %d documents!', $querySnapshot->size());

Parameter
Name	Description
`id`	`string` Identifies the collection to query over. Every collection or subcollection with this ID as the last segment of its path will be included. May not contain a slash.

Returns
Type	Description
`Google\Cloud\Firestore\Query`

runTransaction

Executes a function in a Firestore transaction.

Transactions offer atomic operations, guaranteeing that either all writes will be applied, or none will be applied. The Google Cloud PHP Firestore client also handles automatic retry in cases where transactions fail due to a retryable error.

Transactions will be committed once the provided callable has finished execution. Thrown exceptions will prevent commit and trigger a rollback, and will bubble up to your level to be handled in whatever fashion is appropriate.

This method returns the return value of the given transaction callable.

Example:

use Google\Cloud\Firestore\Transaction;

$transferAmount = 500.00;
$from = $firestore->document('users/john');
$to = $firestore->document('users/dave');

$toNewBalance = $firestore->runTransaction(function (Transaction $t) use ($from, $to, $transferAmount) {
    $fromSnapshot = $t->snapshot($from);
    $toSnapshot = $t->snapshot($to);

    $fromNewBalance = $fromSnapshot['balance'] - $transferAmount;
    $toNewBalance = $toSnapshot['balance'] + $transferAmount;

    // If the transaction cannot be completed, throwing any exception
    // will trigger a rollback operation.
    if ($fromNewBalance < 0) {
        throw new \Exception('User 1 has insufficient funds!');
    }

    $t->update($from, [
        ['path' => 'balance', 'value' => $fromNewBalance]
    ])->update($to, [
        ['path' => 'balance', 'value' => $toNewBalance]
    ]);

    return $toNewBalance;
});

Parameters
Name	Description
`callable`	`callable` A callable function, allowing atomic operations against the Firestore API. Function signature should be of form: `function (Transaction $t)`.
`options`	`array` Configuration Options.
`↳ begin`	`array` Configuration options for BeginTransaction.
`↳ commit`	`array` Configuration options for Commit.
`↳ rollback`	`array` Configuration options for rollback.
`↳ maxRetries`	`int` The maximum number of times to retry failures. Defaults to `5`.

Returns
Type	Description
`mixed`

geoPoint

Create a new GeoPoint

Example:

$geoPoint = $firestore->geoPoint(37.4220, -122.0841);

Parameters
Name	Description
`latitude`	`float` The latitude
`longitude`	`float` The longitude

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

blob

Create a new Blob

Example:

$blob = $firestore->blob('hello world');

// Blobs can be used to store binary data
$blob = $firestore->blob(file_get_contents(__DIR__ .'/family-photo.jpg'));

Parameter
Name	Description
`value`	`string\|resource\|Psr\Http\Message\StreamInterface` The value to store in a blob.

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

fieldPath

Returns a FieldPath class, referring to a field in a document.

The path may consist of a single field name (referring to a top-level field in the document), or a list of field names (referring to a nested field in the document).

Example:

$path = $firestore->fieldPath(['accounts', 'usd']);

Parameter
Name	Description
`fieldNames`	`array` A list of field names.

Returns
Type	Description
`Google\Cloud\Firestore\FieldPath`

sessionHandler

Returns a FirestoreSessionHandler.

Example:

$handler = $firestore->sessionHandler();

// Configure PHP to use the Firestore session handler.
session_set_save_handler($handler, true);
session_save_path('sessions');
session_start();

// Then write and read the $_SESSION array.
$_SESSION['name'] = 'Bob';
echo $_SESSION['name'];

Parameters
Name	Description
`options`	`array` Configuration Options.
`↳ gcLimit`	`int` The number of entities to delete in the garbage collection. Values larger than 500 will be limited to 500. Defaults to `0`, indicating garbage collection is disabled by default.
`↳ collectionNameTemplate`	`string` A sprintf compatible template for formatting the collection name where sessions will be stored. The template receives two values, the first being the save path and the latter being the session name.
`↳ begin`	`array` Configuration options for beginTransaction.
`↳ commit`	`array` Configuration options for commit.
`↳ rollback`	`array` Configuration options for rollback.
`↳ read`	`array` Configuration options for read.
`↳ query`	`array` Configuration options for runQuery.

Returns
Type	Description
`Google\Cloud\Firestore\FirestoreSessionHandler`

Constants

VERSION

Value: '1.28.0'

DEFAULT_DATABASE

Value: '(default)'

FULL_CONTROL_SCOPE

Value: 'https://www.googleapis.com/auth/cloud-platform'

MAX_RETRIES

Value: 5