diff --git a/functions/helloworld_pubsub/index.php b/functions/helloworld_pubsub/index.php
index 3aac9ff60..e232b6f83 100644
--- a/functions/helloworld_pubsub/index.php
+++ b/functions/helloworld_pubsub/index.php
@@ -26,10 +26,7 @@
 // This enables omitting the `FUNCTIONS_SIGNATURE_TYPE=cloudevent` environment
 // variable when deploying. The `FUNCTION_TARGET` environment variable should
 // match the first parameter.
-FunctionsFramework::cloudEvent('helloworldPubsub', 'helloworldPubsub');
-
-function helloworldPubsub(CloudEventInterface $event): void
-{
+FunctionsFramework::cloudEvent('helloworldPubsub', function (CloudEventInterface $event) {
     $log = fopen(getenv('LOGGER_OUTPUT') ?: 'php://stderr', 'wb');
 
     $cloudEventData = $event->getData();
@@ -37,6 +34,6 @@ function helloworldPubsub(CloudEventInterface $event): void
 
     $name = $pubSubData ? htmlspecialchars($pubSubData) : 'World';
     fwrite($log, "Hello, $name!" . PHP_EOL);
-}
+});
 // [END functions_helloworld_pubsub]
 // [END functions_cloudevent_pubsub]
diff --git a/functions/helloworld_storage/index.php b/functions/helloworld_storage/index.php
index f3e886c02..55b15398d 100644
--- a/functions/helloworld_storage/index.php
+++ b/functions/helloworld_storage/index.php
@@ -26,10 +26,7 @@
 // This enables omitting the `FUNCTIONS_SIGNATURE_TYPE=cloudevent` environment
 // variable when deploying. The `FUNCTION_TARGET` environment variable should
 // match the first parameter.
-FunctionsFramework::cloudEvent('helloGCS', 'helloGCS');
-
-function helloGCS(CloudEventInterface $cloudevent)
-{
+FunctionsFramework::cloudEvent('helloGCS', function (CloudEventInterface $cloudevent) {
     // This function supports all Cloud Storage event types.
     $log = fopen(getenv('LOGGER_OUTPUT') ?: 'php://stderr', 'wb');
     $data = $cloudevent->getData();
@@ -40,7 +37,7 @@ function helloGCS(CloudEventInterface $cloudevent)
     fwrite($log, 'Metageneration: ' . $data['metageneration'] . PHP_EOL);
     fwrite($log, 'Created: ' . $data['timeCreated'] . PHP_EOL);
     fwrite($log, 'Updated: ' . $data['updated'] . PHP_EOL);
-}
+});
 
 // [END functions_cloudevent_storage]
 // [END functions_helloworld_storage]