feat(PubSub): Add CreateTopicWithAwsMskIngestion sample

Author: cy-yun

pubsub/api/src/create_topic_with_aws_msk_ingestion.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Copyright 2025 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/blob/main/pubsub/api/README.md
+ */
+
+namespace Google\Cloud\Samples\PubSub;
+
+# [START pubsub_create_topic_with_aws_msk_ingestion]
+use Google\Cloud\PubSub\PubSubClient;
+
+/**
+ * Creates a Pub/Sub topic with AWS MSK ingestion.
+ *
+ * @param string $projectId  The Google project ID.
+ * @param string $topicName  The Pub/Sub topic name.
+ * @param string $clusterArn  The Amazon Resource Name (ARN) that uniquely identifies the cluster.
+ * @param string $mskTopic  The name of the topic in the Amazon MSK cluster that Pub/Sub will import from.
+ * @param string $awsRoleArn  AWS role ARN to be used for Federated Identity authentication with Amazon MSK. Check the Pub/Sub docs for how to set up this role and the required permissions that need to be attached to it.
+ * @param string $gcpServiceAccount  The GCP service account to be used for Federated Identity authentication with Amazon MSK (via a AssumeRoleWithWebIdentity call for the provided role). The aws_role_arn must be set up with accounts.google.com:sub equals to this service account number.
+ */
+function create_topic_with_aws_msk_ingestion($projectId, $topicName, $clusterArn, $mskTopic, $awsRoleArn, $gcpServiceAccount)
+{
+    $pubsub = new PubSubClient([
+        'projectId' => $projectId,
+    ]);
+
+    $topic = $pubsub->createTopic($topicName, [
+        'ingestionDataSourceSettings' => [
+            'aws_msk' => [
+                'cluster_arn' => $clusterArn,
+                'topic' => $mskTopic,
+                'aws_role_arn' => $awsRoleArn,
+                'gcp_service_account' => $gcpServiceAccount
+            ]
+        ]
+    ]);
+
+    printf('Topic created: %s' . PHP_EOL, $topic->name());
+}
+# [END pubsub_create_topic_with_aws_msk_ingestion]
+require_once __DIR__ . '/../../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);