GoogleCloudPlatform · SurferJeffAtGoogle · Jun 17, 2016 · Jun 16, 2016
diff --git a/appengine/flexible/sendgrid/README.md b/appengine/flexible/sendgrid/README.md
@@ -0,0 +1,43 @@
+# Sendgrid and Google App Engine Flexible Environment
+
+This sample application demonstrates how to use [Sendgrid with Google App Engine Flexible Environment](https://cloud.google.com/appengine/docs/flexible/php/sending-emails-with-sendgrid).
+
+## Setup
+
+Before running this sample:
+
+1. You will need a [SendGrid account](http://sendgrid.com/partner/google).
+2. Update `SENDGRID_SENDER` and `SENDGRID_API_KEY` in `app.yaml` to match your
+   SendGrid credentials. You can use your account's sandbox domain.
+
+## Prerequisites
+
+- Install [`composer`](https://getcomposer.org)
+- Install dependencies by running:
+
+```sh
+composer install
+```
+
+## Deploy to App Engine
+
+**Prerequisites**
+
+- Install the [Google Cloud SDK](https://developers.google.com/cloud/sdk/).
+
+**Run Locally**
+```sh
+export SENDGRID_API_KEY=your-sendgrid-api-key
+export [email protected]
+php -S localhost:8000 -t .
+```
+
+**Deploy with gcloud**
+```
+gcloud config set project YOUR_PROJECT_ID
+gcloud preview app deploy
+gcloud preview app browse
+```
+
+The last command will open `https://{YOUR_PROJECT_ID}.appspot.com/`
+in your browser.
diff --git a/appengine/flexible/sendgrid/app.php b/appengine/flexible/sendgrid/app.php
@@ -0,0 +1,56 @@
+<?php
+/**
+ * Copyright 2015 Google Inc.
+ *
+ * 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.
+ */
+use Silex\Application;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+// create the Silex application
+$app = new Application();
+
+$app['sendgrid'] = function (Application $app) {
+    return new SendGrid($app['sendgrid.api_key']);
+};
+
+$app->get('/', function () use ($app) {
+    return <<<EOF
+<!doctype html>
+<html><body>
+<form method="POST">
+<input type="text" name="recipient" placeholder="Enter recipient email">
+<input type="submit" name="submit">
+</form>
+</body></html>
+EOF;
+});
+
+$app->post('/', function (Request $request) use ($app) {
+    $mail = new SendGrid\Mail(
+        new SendGrid\Email(null, $app['sendgrid.sender']),
+        'This is a test email',
+        new SendGrid\Email(null, $request->get('recipient')),
+        new SendGrid\Content('text/plain', 'Example text body.')
+    );
+    /** @var SendGrid $sendgrid */
+    $sendgrid = $app['sendgrid'];
+    $response = $sendgrid->client->mail()->send()->post($mail);
+    if ($response->statusCode() < 200 || $response->statusCode() >= 300) {
+        return new Response($response->body(), $response->statusCode());
+    }
+    return 'Email sent.';
+});
+
+return $app;
diff --git a/appengine/flexible/sendgrid/app.yaml b/appengine/flexible/sendgrid/app.yaml
@@ -0,0 +1,9 @@
+runtime: php
+vm: true
+
+runtime_config:
+  document_root: .
+
+env_variables:
+    SENDGRID_API_KEY: your-sendgrid-api-key
+    SENDGRID_SENDER: your-sendgrid-sender
diff --git a/appengine/flexible/sendgrid/composer.json b/appengine/flexible/sendgrid/composer.json
@@ -0,0 +1,12 @@
+{
+    "require": {
+        "silex/silex": "^1.3",
+        "sendgrid/sendgrid": "^5.0"
+    },
+    "require-dev": {
+        "symfony/browser-kit": "^3.0",
+        "google/cloud-tools": "^0.3.0",
+        "paragonie/random_compat": "^2.0",
+        "symfony/yaml": "^3.1"
+    }
+}