adds twilio sample

Author: bshaffer

appengine/standard/twilio/README.md

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+# Twilio & Google App Engine (Standard)
+
+This sample application demonstrates how to use [Twilio with Google App Engine](https://cloud.google.com/appengine/docs/php/sms/twilio).
+
+## Setup
+
+Before running this sample:
+
+1. You will need a [Twilio account](https://www.twilio.com/user/account).
+1. Update `TWILIO_ACCOUNT_SID` and `TWILIO_AUTH_TOKEN` in `index.php` to match your
+   Twilio credentials. These can be found in your [account settings]
+   (https://www.twilio.com/user/account/settings)
+1. Update `TWILIO_FROM_NUMBER` in `index.php` with a number you have authorized
+   for sending messages. Follow [Twilio's documentation]
+   (https://www.twilio.com/user/account/phone-numbers/getting-started) to set
+   this up.
+
+## Prerequisites
+
+- Install [`composer`](https://getcomposer.org)
+- Install dependencies by running:
+
+```sh
+composer install
+```
+
+## Run locally
+
+you can run locally using PHP's built-in web server:
+
+```sh
+cd php-docs-samples/appengine/standard/twilio
+php -S localhost:8080
+```
+
+Now you can view the app running at [http://localhost:8080](http://localhost:8080)
+in your browser.
+
+## Deploy to App Engine
+
+**Prerequisites**
+
+- Install the [Google Cloud SDK](https://developers.google.com/cloud/sdk/).
+
+**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.

appengine/standard/twilio/app.php

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+<?php
+/**
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * 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;
+
+$app = new Application();
+
+$app->get('/', function () use ($app) {
+    if ($app['twilio.account_sid'] == 'TWILIO_ACCOUNT_SID') {
+        return 'set your Twilio SID and Auth Token in <code>index.php</code>';
+    }
+    $sid = $app['twilio.account_sid'];
+    $token = $app['twilio.auth_token'];
+    $fromNumber = $app['twilio.from_number'];
+    $toNumber = $app['twilio.to_number'];
+
+    # [START send_sms]
+    $client = new Services_Twilio($sid, $token);
+    $sms = $client->account->messages->sendMessage(
+        $fromNumber, // From this number
+        $toNumber,   // Send to this number
+        'Hello monkey!!'
+    );
+
+    return sprintf('Message ID: %s, Message Body: %s', $sms->sid, $sms->body);
+    # [END send_sms]
+});
+
+$app->get('/twiml', function () {
+    # [START twiml]
+    $response = new Services_Twilio_Twiml();
+    $response->say('Hello Monkey');
+
+    return (string) $response;
+    # [END twiml]
+});
+
+return $app;

appengine/standard/twilio/composer.json

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+{
+    "require": {
+        "twilio/sdk": "^4.10",
+        "silex/silex": "^1.3"
+    },
+    "require-dev": {
+        "symfony/browser-kit": "^3.0",
+        "satooshi/php-coveralls": "^1.0"
+    }
+}