PHP & Twilio

1. PHP & TwilioMichael Peacock, October, 2011

2. About MeSenior/Lead Web Developer

3. Web Systems Developer

4. Telemetry Team – Smith Electric Vehicles US Corp

5. Author

6. PHP 5 Social Networking, PHP 5 E-Commerce Development, Drupal Social Networking (6 & 7), Selling online with Drupal e-Commerce, Building Websites with TYPO3

7. PHPNE Volunteer

8. Occasional technical speaker

9. PHP North-East, PHPNW 2010, SuperMondays, PHPNW 2011 Unconference, ConFoo 2012No. Not milk floats (anymore)Photo courtesy of kenjonbro: http://www.flickr.com/photos/kenjonbro/4037649210/in/set-72157623026469013

10. All Electric, Commercial Vehicles.

11. Smith Electric Vehicles & Telemetry Worlds largest manufacturer of Commercial, all-electric vehiclesSmith Link – on-board vehicle telematics system, capturing over 2500 data points each second on the vehicle and broadcasting them over mobile network~400 telemetry enabled vehicles on the roadWorlds largest telemetry project outside of F1

12. Collection of “Infrastructure APIs”Make and receive phone calls

13. Send and receive text messages

14. Buy phone numbers

15. Record caller messages

16. Conference calls

17. IVR: Interactive Voice Response

18. DTMF: Gathering number presses

19. Text to speechSmith, Telemetry & TwilioField Engineers

20. Phone up telemetry to see if a new device they have installed in the field is broadcasting data

21. When in the field their access to laptop / Internet is limited

22. Gives instant feedback which is recorded by the system

23. Customers

24. Proof of concept: Telephone access to telematics data

25. Where is my truck? Geolocate

26. Current metrics: Battery, Current, Voltage, Temperature, Speed

27. Can it get to...does the truck have enough charge to reach a new destination

28. Basic useful information for fleet managers away from their desksApplicationsPotential use cases:Verify customers phone number

29. Provide a telephone based entry point to your web application

30. Let customers phone up to manage their account or track their order on the move

31. Lead generation

32. Numbers for lead sources to track conversions

33. Customer service

34. When your contact form is submitted or an order placed, automatically connect a member of your team to the customer

35. Request a call back formControlled Through XMLCaller dials your number

36. Twilio calls your application, which returns XML instructions

37. XML instructions dictate what Twilio should say, and where to send the user depending on their responseControlled through XMLStandard header:header('Content-type: text/xml');echo '<?xml version="1.0" encoding="UTF-8"?>';<Response>

38. <Gather>

39. <Say>

40. <Redirect>

41. <Dial>

42. <Play>

43. <Record>API & PHP LibraryPHP Library simplifies the REST side of the API, including:

44. Making calls

45. Looking up transcripts

46. Looking up call recordings

47. Buying phone numbers

48. Send SMS messages

49. Control flow is handed through XML, which can be generated using the Twiml class of the PHP Library

50. https://github.com/twilio/twilio-phpSandbox$30 free credit on sign up

51. Sandbox number with access code

52. Until you are ready to buy your own number, you can call their sandbox number, enter a PIN and it redirects to your applicationPhone Numbers$1 per month

53. Available for US, Canada and now (beta) UK

54. Buy online or through the rest APIMake a call$client = newServices_Twilio(‘AC123', '123'); $call = $client->account->calls->create('FROM', 'CALL', 'http://mydomain.com/call-xml' );Call ID is generated:$call->sid;Length is recorded$call->length

55. Speak<Say>Hello conference attendees</Say>$response = new Services_Twilio_Twiml();$response->say(‘Hello conference attendees');echo $ output;

56. Ask for a Response<Response> <Gather action=“my-app-url/process" numDigits="1"><Say>Welcome Conference PHP North West 2011 Delegates.</Say><Say>For talks at 10 45 press 1.</Say></Gather> <Say>Sorry, I didn't get your response.</Say> <Redirect>my-app-url</Redirect></Response>

57. Ask for a Response$response = new Services_Twilio_Twiml();$gather = $response->gather(array('numDigits' => 1));$gather->say("Welcome Conference PHP North West 2011 Delegates.");$gather->say("For talks at 10 45 press 1.");$response->say("Sorry, I didn't catch that");echo $response;

58. Act on a Response$response = (int) $_REQUEST['Digits'];header('Content-type: text/xml');echo '<?xml version="1.0" encoding="UTF-8"?>';Switch( $response ){case 1: echo ‘<Response><Say>Track 1 details…</Say></Response>’ break;case 2:echo ‘<Response><Say>Track 2 details…</Say></Response>’ break;}exit();

59. Transfer the Caller<Dial>+44XXXXXXX</Dial>

60. Enforcing StateEach stage of the application is accessible via a URL. Theoretically, someone could directly visit a deep link (if they know it) and see customer information.Simplest solution is to generate a unique token (with a short TTL) when caller first dials

61. Token is then passed around to each <Redirect> response

62. Any authentication details are associated with the token

63. Tokens regularly cleaned upTwilio ConnectLets you write Twilio applications, hosted and managed on your servers (free or charged for) but that connect directly to your customers Twilioaccount, so they can manage their own Twilio usage billing

64. TwimletsYou don’t have to host code on your server

65. If its a basic script, with no server interaction, you can use “twimlets” http://labs.twilio.com/twimlets/

66. Forward calls

67. Ring up to 10 phones at once until one answers

68. Voice mail

69. Conference call

70. Etc

71. Create them using an online wizard and Twilio hosts the XMLDebugging

72. Demo ApplicationCall: 0161 8840908

73. Really Basic Demo Application<?php$twilio = new TwilioDemo();class TwilioDemo{ public function __construct() { header('Content-type: text/xml'); echo '<?xml version="1.0" encoding="UTF-8"?>'; $route = ( isset( $_GET['route'] ) ) ? $_GET['route'] : ''; switch( $route ) { case 'process': $this->process(); break; default: case ''; $this->menu(); break; } }Based on the URL, redirect the user

74. Really Basic Demo ApplicationRead the menu, if no response selected, repeatprivate function menu() { $out = <<<EOD <Response> <Gather action="http://www./twiliodemo/twiliodemo.php?route=process" numDigits="1"> <Say>Hello PHP North West Conference attendee. At Nine Thirty we have the keynote from Ian Barber, How to Stand on the Shoulders of Giants.</Say> <Say>For talks at 10 45, press 1.</Say> <Say>For talks at 11 45, press 2</Say> <Say>Lunch is at 12 45</Say> <Say>For talks at 2 press 3.</Say> <Say>For talks at 3, press 4.</Say> <Say>For talks at 4 30, press 5.</Say> <Say>For un conference talks, press 6.</Say> </Gather>  <Say>Sorry, I didn't get your response.</Say> <Redirect>http://www..co.uk/twiliodemo/twiliodemo.php?route=main</Redirect> </Response> EOD; echo $out; exit(); }

75. Really Basic Demo Applicationprivate function process() { $selection = (int) $_REQUEST['Digits']; switch( $selection ) { case 1: $this->ten45(); break; case 2: $this->eleven45(); break; case 3: $this->two(); break; case 4: $this->three(); break; case 5: $this->four30(); break; case 5: $this->unconference(); break; default: $this->oi(); break; } }Process based on the user input

76. Really Basic Demo ApplicationRead out the informationprivate function ten45() { echo '<Response>'; echo '<Say>Track 1: Zend Framework 2 - State Of The Art : EnricoZimuel.</Say>'; echo '<Say>Track 2: REST and HATEOAS - A Case Study : Ben Longden.</Say>'; echo '<Say>Track 3: Magic Behind the Numbers - Software Metrics In Practice : Sebastian Marek.</Say>'; echo '<Redirect>http://www.invoicecentral.co.uk/twiliodemo/twiliodemo.php?route=main</Redirect>'; echo '</Response>'; }

77. ConclusionTwilio is really, really easy to use

78. Build a simple application in a minute

79. Build a complex application in five

80. You control the responses through a new request after each user interaction

81. Really cheap to useQ & AMichael PeacockWeb Systems Developer – Telemetry Team – Smith Electric Vehicles US [email protected] / Lead Developer, Author & [email protected] www.michaelpeacock.co.uk@michaelpeacockhttp://joind.in/3819 http://www.slideshare.net/michaelpeacock

PHP & Twilio

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