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 * Copyright 2018 Google LLC
 * 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/spanner/README.md
namespace Google\Cloud\Samples\Spanner;
// [START spanner_dml_write_then_read]
use Google\Cloud\Spanner\SpannerClient;
use Google\Cloud\Spanner\Transaction;
 * Writes then reads data inside a Transaction with a DML statement.
 * The database and table must already exist and can be created using
 * `create_database`.
 * Example:
 * insert_data($instanceId, $databaseId);
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
function write_read_with_dml($instanceId, $databaseId)
    $spanner = new SpannerClient();
    $instance = $spanner->instance($instanceId);
    $database = $instance->database($databaseId);
    $database->runTransaction(function (Transaction $t) use ($spanner) {
        $rowCount = $t->executeUpdate(
            'INSERT Singers (SingerId, FirstName, LastName) '
            . " VALUES (11, 'Timothy', 'Campbell')");
        printf('Inserted %d row(s).' . PHP_EOL, $rowCount);
        $results = $t->execute('SELECT FirstName, LastName FROM Singers WHERE SingerId = 11');
        foreach ($results as $row) {
            printf('%s %s' . PHP_EOL, $row['FirstName'], $row['LastName']);
        $t->commit();
// [END spanner_dml_write_then_read]
// The following 2 lines are only needed to run the samples
require_once __DIR__ . '/../../testing/sample_helpers.php';
\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);

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