diff --git a/secretmanager/src/list_regional_secret_versions_with_filter.php b/secretmanager/src/list_regional_secret_versions_with_filter.php
new file mode 100644
index 0000000000..c86bb03a71
--- /dev/null
+++ b/secretmanager/src/list_regional_secret_versions_with_filter.php
@@ -0,0 +1,57 @@
+<?php
+/*
+ * Copyright 2026 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_with_filter]
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretVersionsRequest;
+
+/**
+ * List secret versions in a location using a filter.
+ *
+ * @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  Secret id (e.g. 'my-secret')
+ * @param string $filter    Filter string (see Secret Manager filtering docs)
+ */
+function list_regional_secret_versions_with_filter(string $projectId, string $locationId, string $secretId, string $filter): void
+{
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+    $client = new SecretManagerServiceClient($options);
+
+    $parent = $client->projectLocationSecretName($projectId, $locationId, $secretId);
+
+    $request = ListSecretVersionsRequest::build($parent)->setFilter($filter);
+
+    foreach ($client->listSecretVersions($request) as $version) {
+        printf('Found secret version %s' . PHP_EOL, $version->getName());
+    }
+}
+// [END secretmanager_list_regional_secret_versions_with_filter]
+
+// 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_with_filter.php b/secretmanager/src/list_regional_secrets_with_filter.php
new file mode 100644
index 0000000000..9f83f7fcb9
--- /dev/null
+++ b/secretmanager/src/list_regional_secrets_with_filter.php
@@ -0,0 +1,56 @@
+<?php
+/*
+ * Copyright 2026 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_with_filter]
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretsRequest;
+
+/**
+ * List secrets in a location using a filter.
+ *
+ * @param string $projectId Your Google Cloud project id (e.g. 'my-project')
+ * @param string $locationId Your secret location (e.g. 'us-central1')
+ * @param string $filter    Filter string (see Secret Manager filtering docs)
+ */
+function list_regional_secrets_with_filter(string $projectId, string $locationId, string $filter): void
+{
+    $options = ['apiEndpoint' => "secretmanager.$locationId.rep.googleapis.com"];
+    $client = new SecretManagerServiceClient($options);
+
+    $parent = $client->locationName($projectId, $locationId);
+
+    $request = ListSecretsRequest::build($parent)->setFilter($filter);
+
+    foreach ($client->listSecrets($request) as $secret) {
+        printf('Found secret %s' . PHP_EOL, $secret->getName());
+    }
+}
+// [END secretmanager_list_regional_secrets_with_filter]
+
+// 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_secret_versions_with_filter.php b/secretmanager/src/list_secret_versions_with_filter.php
new file mode 100644
index 0000000000..d6fb6c2866
--- /dev/null
+++ b/secretmanager/src/list_secret_versions_with_filter.php
@@ -0,0 +1,55 @@
+<?php
+/*
+ * Copyright 2026 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_secret_versions_with_filter]
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretVersionsRequest;
+
+/**
+ * List secret versions for a secret using a filter.
+ *
+ * @param string $projectId Your Google Cloud project id (e.g. 'my-project')
+ * @param string $secretId  Your secret id (e.g. 'my-secret')
+ * @param string $filter    Filter string (see Secret Manager filtering docs)
+ */
+function list_secret_versions_with_filter(string $projectId, string $secretId, string $filter): void
+{
+    $client = new SecretManagerServiceClient();
+
+    $parent = $client->secretName($projectId, $secretId);
+
+    $request = ListSecretVersionsRequest::build($parent)->setFilter($filter);
+
+    foreach ($client->listSecretVersions($request) as $version) {
+        printf('Found secret version %s' . PHP_EOL, $version->getName());
+    }
+}
+// [END secretmanager_list_secret_versions_with_filter]
+
+// 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_secrets_with_filter.php b/secretmanager/src/list_secrets_with_filter.php
new file mode 100644
index 0000000000..2d07bed0d2
--- /dev/null
+++ b/secretmanager/src/list_secrets_with_filter.php
@@ -0,0 +1,54 @@
+<?php
+/*
+ * Copyright 2026 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_secrets_with_filter]
+use Google\Cloud\SecretManager\V1\Client\SecretManagerServiceClient;
+use Google\Cloud\SecretManager\V1\ListSecretsRequest;
+
+/**
+ * List secrets in a project using a filter.
+ *
+ * @param string $projectId Your Google Cloud project id (e.g. 'my-project')
+ * @param string $filter    Filter string (see Secret Manager filtering docs)
+ */
+function list_secrets_with_filter(string $projectId, string $filter): void
+{
+    $client = new SecretManagerServiceClient();
+
+    $parent = $client->projectName($projectId);
+
+    $request = ListSecretsRequest::build($parent)->setFilter($filter);
+
+    foreach ($client->listSecrets($request) as $secret) {
+        printf('Found secret %s' . PHP_EOL, $secret->getName());
+    }
+}
+// [END secretmanager_list_secrets_with_filter]
+
+// 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
index 18c9c97ac5..c85008eff1 100644
--- a/secretmanager/test/regionalsecretmanagerTest.php
+++ b/secretmanager/test/regionalsecretmanagerTest.php
@@ -405,6 +405,23 @@ public function testIamRevokeAccess()
         $this->assertStringContainsString('Updated IAM policy', $output);
     }
 
+    public function testListSecretVersionsWithFilter()
+    {
+        $name = self::$client->parseName(self::$testSecretWithVersions->getName());
+
+        // Filter for enabled versions.
+        $filter = 'state = ENABLED';
+
+        $output = $this->runFunctionSnippet('list_regional_secret_versions_with_filter', [
+            $name['project'],
+            $name['location'],
+            $name['secret'],
+            $filter,
+        ]);
+
+        $this->assertStringContainsString('Found secret version', $output);
+    }
+
     public function testListSecretVersions()
     {
         $name = self::$client->parseName(self::$testSecretWithVersions->getName());
@@ -418,6 +435,21 @@ public function testListSecretVersions()
         $this->assertStringContainsString('secret version', $output);
     }
 
+    public function testListSecretsWithFilter()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $filter = 'name:' . $name['secret'];
+
+        $output = $this->runFunctionSnippet('list_regional_secrets_with_filter', [
+            $name['project'],
+            $name['location'],
+            $filter,
+        ]);
+
+        $this->assertStringContainsString('Found secret', $output);
+    }
+
     public function testListSecrets()
     {
         $name = self::$client->parseName(self::$testSecret->getName());
diff --git a/secretmanager/test/secretmanagerTest.php b/secretmanager/test/secretmanagerTest.php
index 11b9dd3bd6..c7826a91e6 100644
--- a/secretmanager/test/secretmanagerTest.php
+++ b/secretmanager/test/secretmanagerTest.php
@@ -414,6 +414,22 @@ public function testIamRevokeAccess()
         $this->assertStringContainsString('Updated IAM policy', $output);
     }
 
+    public function testListSecretVersionsWithFilter()
+    {
+        $name = self::$client->parseName(self::$testSecretWithVersions->getName());
+
+        // Filter for enabled versions.
+        $filter = 'state = ENABLED';
+
+        $output = $this->runFunctionSnippet('list_secret_versions_with_filter', [
+            $name['project'],
+            $name['secret'],
+            $filter,
+        ]);
+
+        $this->assertStringContainsString('Found secret version', $output);
+    }
+
     public function testListSecretVersions()
     {
         $name = self::$client->parseName(self::$testSecretWithVersions->getName());
@@ -426,6 +442,20 @@ public function testListSecretVersions()
         $this->assertStringContainsString('secret version', $output);
     }
 
+    public function testListSecretsWithFilter()
+    {
+        $name = self::$client->parseName(self::$testSecret->getName());
+
+        $filter = 'name:' . $name['secret'];
+
+        $output = $this->runFunctionSnippet('list_secrets_with_filter', [
+            $name['project'],
+            $filter,
+        ]);
+
+        $this->assertStringContainsString('Found secret', $output);
+    }
+
     public function testListSecrets()
     {
         $name = self::$client->parseName(self::$testSecret->getName());