diff --git a/secretmanager/composer.json b/secretmanager/composer.json
index c52bc1c5b4..ad1f41e13f 100644
--- a/secretmanager/composer.json
+++ b/secretmanager/composer.json
@@ -1,5 +1,5 @@
 {
     "require": {
-        "google/cloud-secret-manager": "^1.13"
+        "google/cloud-secret-manager": "^1.15.2"
     }
 }
diff --git a/secretmanager/src/access_regional_secret_version.php b/secretmanager/src/access_regional_secret_version.php
new file mode 100644
index 0000000000..93e8a1d037
--- /dev/null
+++ b/secretmanager/src/access_regional_secret_version.php
@@ -0,0 +1,71 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_access_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\AccessSecretVersionRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $versionId Your version ID (e.g. 'latest' or '5');
+ */
+function access_regional_secret_version(
+    string $projectId,
+    string $locationId,
+    string $secretId,
+    string $versionId
+): void {
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret version.
+    $name = $client->projectLocationSecretSecretVersionName($projectId, $locationId, $secretId, $versionId);
+
+    // Build the request.
+    $request = AccessSecretVersionRequest::build($name);
+
+    // Access the secret version.
+    $response = $client->accessSecretVersion($request);
+
+    // Print the secret payload.
+    //
+    // WARNING: Do not print the secret in a production environment - this
+    // snippet is showing how to access the secret material.
+    $payload = $response->getPayload()->getData();
+    printf('Plaintext: %s', $payload);
+}
+// [END secretmanager_access_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/add_regional_secret_version.php b/secretmanager/src/add_regional_secret_version.php
new file mode 100644
index 0000000000..54edf72fc8
--- /dev/null
+++ b/secretmanager/src/add_regional_secret_version.php
@@ -0,0 +1,66 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_add_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\AddSecretVersionRequest;
+use Google\Cloud\SecretManager\V1\SecretPayload;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function add_regional_secret_version(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the parent secret and the payload.
+    $parent = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+    $secretPayload = new SecretPayload([
+        'data' => 'my super secret data',
+    ]);
+
+    // Build the request.
+    $request = AddSecretVersionRequest::build($parent, $secretPayload);
+
+    // Access the secret version.
+    $response = $client->addSecretVersion($request);
+
+    // Print the new secret version name.
+    printf('Added secret version: %s', $response->getName());
+}
+// [END secretmanager_add_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/create_regional_secret.php b/secretmanager/src/create_regional_secret.php
new file mode 100644
index 0000000000..4506673542
--- /dev/null
+++ b/secretmanager/src/create_regional_secret.php
@@ -0,0 +1,65 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_create_regional_secret]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\CreateSecretRequest;
+use Google\Cloud\SecretManager\V1\Secret;
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function create_regional_secret(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the parent project.
+    $parent = $client->locationName($projectId, $locationId);
+
+    $secret = new Secret();
+
+    // Build the request.
+    $request = CreateSecretRequest::build($parent, $secretId, $secret);
+
+    // Create the secret.
+    $newSecret = $client->createSecret($request);
+
+    // Print the new secret name.
+    printf('Created secret: %s', $newSecret->getName());
+}
+// [END secretmanager_create_regional_secret]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/create_secret_with_user_managed_replication.php b/secretmanager/src/create_secret_with_user_managed_replication.php
index 9985caccc8..bda990f97d 100644
--- a/secretmanager/src/create_secret_with_user_managed_replication.php
+++ b/secretmanager/src/create_secret_with_user_managed_replication.php
@@ -38,8 +38,11 @@
  * @param string $secretId  Your secret ID (e.g. 'my-secret')
  * @param array  $locations Replication locations (e.g. array('us-east1', 'us-east4'))
  */
-function create_secret_with_user_managed_replication(string $projectId, string $secretId, array $locations): void
-{
+function create_secret_with_user_managed_replication(
+    string $projectId,
+    string $secretId,
+    array $locations
+): void {
     // Create the Secret Manager client.
     $client = new SecretManagerServiceClient();
 
diff --git a/secretmanager/src/delete_regional_secret.php b/secretmanager/src/delete_regional_secret.php
new file mode 100644
index 0000000000..47bbcfdfa5
--- /dev/null
+++ b/secretmanager/src/delete_regional_secret.php
@@ -0,0 +1,60 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_delete_regional_secret]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\DeleteSecretRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function delete_regional_secret(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Build the request.
+    $request = DeleteSecretRequest::build($name);
+
+    // Delete the secret.
+    $client->deleteSecret($request);
+    printf('Deleted secret %s', $secretId);
+}
+// [END secretmanager_delete_regional_secret]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/destroy_regional_secret_version.php b/secretmanager/src/destroy_regional_secret_version.php
new file mode 100644
index 0000000000..7fcdc9bd3e
--- /dev/null
+++ b/secretmanager/src/destroy_regional_secret_version.php
@@ -0,0 +1,67 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_destroy_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\DestroySecretVersionRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $versionId Your version ID (e.g. 'latest' or '5');
+ */
+function destroy_regional_secret_version(
+    string $projectId,
+    string $locationId,
+    string $secretId,
+    string $versionId
+): void {
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret version.
+    $name = $client->projectLocationSecretSecretVersionName($projectId, $locationId, $secretId, $versionId);
+
+    // Build the request.
+    $request = DestroySecretVersionRequest::build($name);
+
+    // Destroy the secret version.
+    $response = $client->destroySecretVersion($request);
+
+    // Print a success message.
+    printf('Destroyed secret version: %s', $response->getName());
+}
+// [END secretmanager_destroy_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/disable_regional_secret_version.php b/secretmanager/src/disable_regional_secret_version.php
new file mode 100644
index 0000000000..a34f0d7a9d
--- /dev/null
+++ b/secretmanager/src/disable_regional_secret_version.php
@@ -0,0 +1,67 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_disable_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\DisableSecretVersionRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $versionId Your version ID (e.g. 'latest' or '5');
+ */
+function disable_regional_secret_version(
+    string $projectId,
+    string $locationId,
+    string $secretId,
+    string $versionId
+): void {
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret version.
+    $name = $client->projectLocationSecretSecretVersionName($projectId, $locationId, $secretId, $versionId);
+
+    // Build the request.
+    $request = DisableSecretVersionRequest::build($name);
+
+    // Disable the secret version.
+    $response = $client->disableSecretVersion($request);
+
+    // Print a success message.
+    printf('Disabled secret version: %s', $response->getName());
+}
+// [END secretmanager_disable_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/enable_regional_secret_version.php b/secretmanager/src/enable_regional_secret_version.php
new file mode 100644
index 0000000000..d237d12805
--- /dev/null
+++ b/secretmanager/src/enable_regional_secret_version.php
@@ -0,0 +1,67 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_enable_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\EnableSecretVersionRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $versionId Your version ID (e.g. 'latest' or '5');
+ */
+function enable_regional_secret_version(
+    string $projectId,
+    string $locationId,
+    string $secretId,
+    string $versionId
+): void {
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret version.
+    $name = $client->projectLocationSecretSecretVersionName($projectId, $locationId, $secretId, $versionId);
+
+    // Build the request.
+    $request = EnableSecretVersionRequest::build($name);
+
+    // Enable the secret version.
+    $response = $client->enableSecretVersion($request);
+
+    // Print a success message.
+    printf('Enabled secret version: %s', $response->getName());
+}
+// [END secretmanager_enable_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/get_regional_secret.php b/secretmanager/src/get_regional_secret.php
new file mode 100644
index 0000000000..ad0014ad11
--- /dev/null
+++ b/secretmanager/src/get_regional_secret.php
@@ -0,0 +1,62 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_get_regional_secret]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\GetSecretRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function get_regional_secret(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Build the request.
+    $request = GetSecretRequest::build($name);
+
+    // Get the secret.
+    $secret = $client->getSecret($request);
+
+    // Print data about the secret.
+    printf('Got secret %s ', $secret->getName());
+}
+// [END secretmanager_get_regional_secret]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/get_regional_secret_version.php b/secretmanager/src/get_regional_secret_version.php
new file mode 100644
index 0000000000..0e50e2410f
--- /dev/null
+++ b/secretmanager/src/get_regional_secret_version.php
@@ -0,0 +1,71 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_get_regional_secret_version]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\SecretVersion\State;
+use Google\Cloud\SecretManager\V1\GetSecretVersionRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $versionId Your version ID (e.g. 'latest' or '5');
+ */
+function get_regional_secret_version(
+    string $projectId,
+    string $locationId,
+    string $secretId,
+    string $versionId
+): void {
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret version.
+    $name = $client->projectLocationSecretSecretVersionName($projectId, $locationId, $secretId, $versionId);
+
+    // Build the request.
+    $request = GetSecretVersionRequest::build($name);
+
+    // Access the secret version.
+    $response = $client->getSecretVersion($request);
+
+    // Get the state string from the enum.
+    $state = State::name($response->getState());
+
+    // Print a success message.
+    printf('Got secret version %s with state %s', $response->getName(), $state);
+}
+// [END secretmanager_get_regional_secret_version]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/list_regional_secret_versions.php b/secretmanager/src/list_regional_secret_versions.php
new file mode 100644
index 0000000000..3e403ede99
--- /dev/null
+++ b/secretmanager/src/list_regional_secret_versions.php
@@ -0,0 +1,61 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_list_regional_secret_versions]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretVersionsRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function list_regional_secret_versions(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the parent secret.
+    $parent = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Build the request.
+    $request = ListSecretVersionsRequest::build($parent);
+
+    // List all secret versions.
+    foreach ($client->listSecretVersions($request) as $version) {
+        printf('Found secret version %s', $version->getName());
+    }
+}
+// [END secretmanager_list_regional_secret_versions]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/list_regional_secrets.php b/secretmanager/src/list_regional_secrets.php
new file mode 100644
index 0000000000..b81d9342e1
--- /dev/null
+++ b/secretmanager/src/list_regional_secrets.php
@@ -0,0 +1,60 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_list_regional_secrets]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretsRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ */
+function list_regional_secrets(string $projectId, string $locationId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the parent secret.
+    $parent = $client->locationName($projectId, $locationId);
+
+    // Build the request.
+    $request = ListSecretsRequest::build($parent);
+
+    // List all secrets.
+    foreach ($client->listSecrets($request) as $secret) {
+        printf('Found secret %s', $secret->getName());
+    }
+}
+// [END secretmanager_list_regional_secrets]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/regional_iam_grant_access.php b/secretmanager/src/regional_iam_grant_access.php
new file mode 100644
index 0000000000..7142c4cac8
--- /dev/null
+++ b/secretmanager/src/regional_iam_grant_access.php
@@ -0,0 +1,80 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_regional_iam_grant_access]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+
+// Import the Secret Manager IAM library.
+use Google\Cloud\Iam\V1\Binding;
+use Google\Cloud\Iam\V1\GetIamPolicyRequest;
+use Google\Cloud\Iam\V1\SetIamPolicyRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $member Your member (e.g. 'user:foo@example.com')
+ */
+function regional_iam_grant_access(string $projectId, string $locationId, string $secretId, string $member): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Get the current IAM policy.
+    $policy = $client->getIamPolicy((new GetIamPolicyRequest)->setResource($name));
+
+    // Update the bindings to include the new member.
+    $bindings = $policy->getBindings();
+    $bindings[] = new Binding([
+        'members' => [$member],
+        'role' => 'roles/secretmanager.secretAccessor',
+    ]);
+    $policy->setBindings($bindings);
+
+    // Build the request.
+    $request = (new SetIamPolicyRequest)
+        ->setResource($name)
+        ->setPolicy($policy);
+
+    // Save the updated policy to the server.
+    $client->setIamPolicy($request);
+
+    // Print out a success message.
+    printf('Updated IAM policy for %s', $secretId);
+}
+// [END secretmanager_regional_iam_grant_access]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/regional_iam_revoke_access.php b/secretmanager/src/regional_iam_revoke_access.php
new file mode 100644
index 0000000000..8cfffc9da3
--- /dev/null
+++ b/secretmanager/src/regional_iam_revoke_access.php
@@ -0,0 +1,83 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_regional_iam_revoke_access]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\Iam\V1\GetIamPolicyRequest;
+use Google\Cloud\Iam\V1\SetIamPolicyRequest;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ * @param string $member Your member (e.g. 'user:foo@example.com')
+ */
+function regional_iam_revoke_access(string $projectId, string $locationId, string $secretId, string $member): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Get the current IAM policy.
+    $policy = $client->getIamPolicy((new GetIamPolicyRequest)->setResource($name));
+
+    // Remove the member from the list of bindings.
+    foreach ($policy->getBindings() as $binding) {
+        if ($binding->getRole() == 'roles/secretmanager.secretAccessor') {
+            $members = $binding->getMembers();
+            foreach ($members as $i => $existingMember) {
+                if ($member == $existingMember) {
+                    unset($members[$i]);
+                    $binding->setMembers($members);
+                    break;
+                }
+            }
+        }
+    }
+
+    // Build the request.
+    $request = (new SetIamPolicyRequest)
+        ->setResource($name)
+        ->setPolicy($policy);
+
+    // Save the updated policy to the server.
+    $client->setIamPolicy($request);
+
+    // Print out a success message.
+    printf('Updated IAM policy for %s', $secretId);
+}
+// [END secretmanager_regional_iam_revoke_access]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/update_regional_secret.php b/secretmanager/src/update_regional_secret.php
new file mode 100644
index 0000000000..1e605261a3
--- /dev/null
+++ b/secretmanager/src/update_regional_secret.php
@@ -0,0 +1,71 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_update_regional_secret]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Secret;
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\UpdateSecretRequest;
+use Google\Protobuf\FieldMask;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function update_regional_secret(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Update the secret.
+    $secret = (new Secret())
+        ->setName($name)
+        ->setLabels(['secretmanager' => 'rocks']);
+
+    $updateMask = (new FieldMask())
+        ->setPaths(['labels']);
+
+    // Build the request.
+    $request = UpdateSecretRequest::build($secret, $updateMask);
+
+    $response = $client->updateSecret($request);
+
+    // Print the upated secret.
+    printf('Updated secret: %s', $response->getName());
+}
+// [END secretmanager_update_regional_secret]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/src/update_regional_secret_with_alias.php b/secretmanager/src/update_regional_secret_with_alias.php
new file mode 100644
index 0000000000..b86f0185fb
--- /dev/null
+++ b/secretmanager/src/update_regional_secret_with_alias.php
@@ -0,0 +1,71 @@
+<?php
+/*
+ * Copyright 2024 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/main/secretmanager/README.md
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+// [START secretmanager_update_regional_secret_with_alias]
+// Import the Secret Manager client library.
+use Google\Cloud\SecretManager\V1\Secret;
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\UpdateSecretRequest;
+use Google\Protobuf\FieldMask;
+
+/**
+ * @param string $projectId Your Google Cloud Project ID (e.g. 'my-project')
+ * @param string $locationId Your secret Location (e.g. "us-central1")
+ * @param string $secretId  Your secret ID (e.g. 'my-secret')
+ */
+function update_regional_secret_with_alias(string $projectId, string $locationId, string $secretId): void
+{
+    // Specify regional endpoint.
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+
+    // Create the Secret Manager client.
+    $client = new SecretManagerServiceClient($options);
+
+    // Build the resource name of the secret.
+    $name = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    // Update the secret.
+    $secret = (new Secret())
+      ->setName($name)
+      ->setVersionAliases(['test' => '1']);
+
+    $updateMask = (new FieldMask())
+      ->setPaths(['version_aliases']);
+
+    // Build the request.
+    $request = UpdateSecretRequest::build($secret, $updateMask);
+
+    $response = $client->updateSecret($request);
+
+    // Print the upated secret.
+    printf('Updated secret: %s', $response->getName());
+}
+// [END secretmanager_update_regional_secret_with_alias]
+
+// The following 2 lines are only needed to execute the samples on the CLI
+require_once __DIR__ . '/../../testing/sample_helpers.php';
+\Google\Cloud\Samples\execute_sample(__FILE__, __NAMESPACE__, $argv);
diff --git a/secretmanager/test/regionalsecretmanagerTest.php b/secretmanager/test/regionalsecretmanagerTest.php
new file mode 100644
index 0000000000..80c6946200
--- /dev/null
+++ b/secretmanager/test/regionalsecretmanagerTest.php
@@ -0,0 +1,327 @@
+<?php
+/*
+ * Copyright 2024 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.
+ */
+
+declare(strict_types=1);
+
+namespace Google\Cloud\Samples\SecretManager;
+
+use Google\ApiCore\ApiException as GaxApiException;
+use Google\Cloud\SecretManager\V1\AddSecretVersionRequest;
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\CreateSecretRequest;
+use Google\Cloud\SecretManager\V1\DeleteSecretRequest;
+use Google\Cloud\SecretManager\V1\DisableSecretVersionRequest;
+use Google\Cloud\SecretManager\V1\Secret;
+use Google\Cloud\SecretManager\V1\SecretPayload;
+use Google\Cloud\SecretManager\V1\SecretVersion;
+use Google\Cloud\TestUtils\TestTrait;
+use PHPUnit\Framework\TestCase;
+
+class regionalsecretmanagerTest extends TestCase
+{
+    use TestTrait;
+
+    private static $client;
+    private static $testSecret;
+    private static $testSecretToDelete;
+    private static $testSecretWithVersions;
+    private static $testSecretToCreateName;
+    private static $testSecretVersion;
+    private static $testSecretVersionToDestroy;
+    private static $testSecretVersionToDisable;
+    private static $testSecretVersionToEnable;
+
+    private static $iamUser = 'user:kapishsingh@google.com';
+    private static $locationId = 'us-central1';
+
+    public static function setUpBeforeClass(): void
+    {
+        $options = ['apiEndpoint' => 'secretmanager.' . self::$locationId . '.rep.googleapis.com' ];
+        self::$client = new SecretManagerServiceClient($options);
+
+        self::$testSecret = self::createSecret();
+        self::$testSecretToDelete = self::createSecret();
+        self::$testSecretWithVersions = self::createSecret();
+        self::$testSecretToCreateName = self::$client->projectLocationSecretName(self::$projectId, self::$locationId, self::randomSecretId());
+        self::$testSecretVersion = self::addSecretVersion(self::$testSecretWithVersions);
+        self::$testSecretVersionToDestroy = self::addSecretVersion(self::$testSecretWithVersions);
+        self::$testSecretVersionToDisable = self::addSecretVersion(self::$testSecretWithVersions);
+        self::$testSecretVersionToEnable = self::addSecretVersion(self::$testSecretWithVersions);
+        self::disableSecretVersion(self::$testSecretVersionToEnable);
+    }
+
+    public static function tearDownAfterClass(): void
+    {
+        $options = ['apiEndpoint' => 'secretmanager.' . self::$locationId . '.rep.googleapis.com' ];
+        self::$client = new SecretManagerServiceClient($options);
+
+        self::deleteSecret(self::$testSecret->getName());
+        self::deleteSecret(self::$testSecretToDelete->getName());
+        self::deleteSecret(self::$testSecretWithVersions->getName());
+        self::deleteSecret(self::$testSecretToCreateName);
+    }
+
+    private static function randomSecretId(): string
+    {
+        return uniqid('php-snippets-');
+    }
+
+    private static function createSecret(): Secret
+    {
+        $parent = self::$client->locationName(self::$projectId, self::$locationId);
+        $secretId = self::randomSecretId();
+        $createSecretRequest = (new CreateSecretRequest())
+            ->setParent($parent)
+            ->setSecretId($secretId)
+            ->setSecret(new Secret());
+
+        return self::$client->createSecret($createSecretRequest);
+    }
+
+    private static function addSecretVersion(Secret $secret): SecretVersion
+    {
+        $addSecretVersionRequest = (new AddSecretVersionRequest())
+            ->setParent($secret->getName())
+            ->setPayload(new SecretPayload([
+            'data' => 'my super secret data',
+        ]));
+        return self::$client->addSecretVersion($addSecretVersionRequest);
+    }
+
+    private static function disableSecretVersion(SecretVersion $version): SecretVersion
+    {
+        $disableSecretVersionRequest = (new DisableSecretVersionRequest())
+            ->setName($version->getName());
+        return self::$client->disableSecretVersion($disableSecretVersionRequest);
+    }
+
+    private static function deleteSecret(string $name)
+    {
+        try {
+            $deleteSecretRequest = (new DeleteSecretRequest())
+                ->setName($name);
+            self::$client->deleteSecret($deleteSecretRequest);
+        } catch (GaxApiException $e) {
+            if ($e->getStatus() != 'NOT_FOUND') {
+                throw $e;
+            }
+        }
+    }
+
+    public function testAccessSecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretVersion->getName());
+
+        $output = $this->runFunctionSnippet('access_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $name['secret_version'],
+        ]);
+
+        $this->assertStringContainsString('my super secret data', $output);
+    }
+
+    public function testAddSecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretWithVersions->getName());
+
+        $output = $this->runFunctionSnippet('add_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('Added secret version', $output);
+    }
+
+    public function testCreateSecret()
+    {
+        $name = self::$client->parseName(self::$testSecretToCreateName);
+
+        $output = $this->runFunctionSnippet('create_regional_secret', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('Created secret', $output);
+    }
+
+    public function testDeleteSecret()
+    {
+        $name = self::$client->parseName(self::$testSecretToDelete->getName());
+
+        $output = $this->runFunctionSnippet('delete_regional_secret', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('Deleted secret', $output);
+    }
+
+    public function testDestroySecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretVersionToDestroy->getName());
+
+        $output = $this->runFunctionSnippet('destroy_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $name['secret_version'],
+        ]);
+
+        $this->assertStringContainsString('Destroyed secret version', $output);
+    }
+
+    public function testDisableSecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretVersionToDisable->getName());
+
+        $output = $this->runFunctionSnippet('disable_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $name['secret_version'],
+        ]);
+
+        $this->assertStringContainsString('Disabled secret version', $output);
+    }
+
+    public function testEnableSecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretVersionToEnable->getName());
+
+        $output = $this->runFunctionSnippet('enable_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $name['secret_version'],
+        ]);
+
+        $this->assertStringContainsString('Enabled secret version', $output);
+    }
+
+    public function testGetSecretVersion()
+    {
+        $name = self::$client->parseName(self::$testSecretVersion->getName());
+
+        $output = $this->runFunctionSnippet('get_regional_secret_version', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $name['secret_version'],
+        ]);
+
+        $this->assertStringContainsString('Got secret version', $output);
+        $this->assertStringContainsString('state ENABLED', $output);
+    }
+
+    public function testGetSecret()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $output = $this->runFunctionSnippet('get_regional_secret', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('secret', $output);
+    }
+
+    public function testIamGrantAccess()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $output = $this->runFunctionSnippet('regional_iam_grant_access', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            self::$iamUser,
+        ]);
+
+        $this->assertStringContainsString('Updated IAM policy', $output);
+    }
+
+    public function testIamRevokeAccess()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $output = $this->runFunctionSnippet('regional_iam_revoke_access', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            self::$iamUser,
+        ]);
+
+        $this->assertStringContainsString('Updated IAM policy', $output);
+    }
+
+    public function testListSecretVersions()
+    {
+        $name = self::$client->parseName(self::$testSecretWithVersions->getName());
+
+        $output = $this->runFunctionSnippet('list_regional_secret_versions', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('secret version', $output);
+    }
+
+    public function testListSecrets()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $output = $this->runFunctionSnippet('list_regional_secrets', [
+            $name['project'],
+            $name['location'],
+        ]);
+
+        $this->assertStringContainsString('secret', $output);
+        $this->assertStringContainsString($name['secret'], $output);
+    }
+
+    public function testUpdateSecret()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $output = $this->runFunctionSnippet('update_regional_secret', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('Updated secret', $output);
+    }
+
+    public function testUpdateSecretWithAlias()
+    {
+        $name = self::$client->parseName(self::$testSecretWithVersions->getName());
+
+        $output = $this->runFunctionSnippet('update_regional_secret_with_alias', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+        ]);
+
+        $this->assertStringContainsString('Updated secret', $output);
+    }
+}