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<?php

/**

* Copyright 2018 Google Inc.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

/**

* For instructions on how to run the full sample:

*

* @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/firestore/README.md

*/

namespace Google\Cloud\Samples\Firestore;

use Google\Cloud\Firestore\FirestoreClient;

/**

* Get a document reference.

* ```

* document_ref('your-project-id');

* ```

*/

function document_ref($projectId)

{

// Create the Cloud Firestore client

$db = new FirestoreClient([

'projectId' => $projectId,

]);

# [START fs_document_ref]

$document = $db->collection('users')->document('lovelace');

# [END fs_document_ref]

}