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Phone calls and sms from php

The document discusses how to utilize Twilio's APIs for handling phone calls and SMS interactions in PHP applications. It provides examples of sending SMS messages, managing phone calls using TwiML (Twilio Markup Language), and implementing Interactive Voice Response (IVR) systems. Key features include sending notifications, two-factor authentication, and call management functionalities.

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Phone Calls and SMS from PHP PHP World 2016 David Stockton November 16, 2016
Standard Interactions
Input
Web Pages / Forms
APIs
CLI
Output
HTML
Graphics
Documents
Reports
JSON
Console Output
Files
How else can we receive input and produce output?
Input: Phone Call
Input: SMS Message
Output: Text Message
Output: MMS Message
Output: Phone Call
APIs for Phone Interaction
Twilio SDK composer require twilio/sdk
Let's Send an SMS new TwilioRestClient($config['sid'], $config['token']); Make a client
Let's Send an SMS $client->messages->create(
 $toNumber,
 array(
 'from' => '+1<purchased#>',
 'body' => $fortune
 )
 );
All Together $toNumber = $argv[1] ?? '<default #>';
 
 $toNumber = PhpWorld Utility::normalizeNumber($toNumber);
 
 $fortune = $argv[2] ?? `fortune`;
 
 $client->messages->create(
 $toNumber,
 array(
 'from' => '+<purchased #>',
 'body' => $fortune
 )
 );
How to Use? $ php bin/fortune.php $ php bin/fortune.php <destination #> $ php bin/fortune.php <destination #> "Text message from the command line"
php bin/fortune.php
php bin/fortune.php 7206757471
php bin/fortune.php 7206757471 "Your account has been created or something."
What can we do? • Notifications • Two-Factor Authentication (2FA) • Responses to Queries
Make a Phone Call • API Call to Twitter • Twitter contacts URL for instructions
TwiML • Twilio's Markup Language for controlling phone calls • XML
TwiML Commands • Say - Read text to the caller • Play - Play an audio file for the caller • Dial - Add another party to the call • Record - Record the caller's voice • Gather - Collect digits the caller types on their keypad • Sms - Send an SMS message during a phone call
More TwiML • Hangup - Hang up the call • Queue - Add the caller to a queue of callers. • Redirect - Redirect call flow to a different TwiML document. • Pause - Wait before executing more instructions • Reject - Decline an incoming call without being billed. • Message - Send an MMS or SMS message reply
How Outgoing Calls Work Your App TwilioAPI Call TwiML CalleeTwilio Plays Twiml
TwiML <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
XML <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
Root Element <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
Commands - Say <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
<?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response> Commands - Record
Configure Twilio
Let's Make a Call <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="man">
 Due to inclement weather, school
 will be closed tomorrow. Please
 stay home and stay safe.
 </Say>
 </Response>
The Full File <?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="man" loop="2">
 Due to inclement weather, school
 will be closed tomorrow. Please
 stay home and stay safe.
 </Say>
 </Response>
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Tell Twilio Who To Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
Phone and SMS Conversations • Twilio is like a well-behaved HTTP client • It uses sessions • We can use session to remember things about the caller or the conversation
Phone IVR • Give callers a menu • Look up information • Connect to people • Solve problems • Give answers
First TwiML <?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
<?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response> Greeting
<?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response> Menu
Error Handling <?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
Goodbye. <?php header('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
Now What? • What if they press something that's not 1-4? • What if they press 1-4? • Need to figure out what to do next
Handle ! 1-4 <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 session_start();
 $digits = $_POST['Digits'] ?? 0;
 
 switch ($digits) {
 case 1: // Random sound
 case 2: // Conference call
 case 3: // Random Phrase
 case 4: // Support queue
 default:
 if (countFailures() >= 3) {
 echo bailOnCall();
 return;
 }
 echo badInput();
 return;
 }
countFailures() function countFailures($count = null)
 {
 $badInput = $count ?? $_SESSION[__FUNCTION__] ?? 0;
 $badInput++;
 $_SESSION[__FUNCTION__] = $badInput;
 return $badInput;
 }
badInput() function badInput()
 {
 header('Content-type: text/xml');
 $twiml = new TwilioTwiml();
 $twiml->say('That was not a valid selection.');
 $twiml->redirect('/twiml/ivr_menu.php');
 return $twiml;
 }
bailOnCall() function bailOnCall()
 {
 header('Content-type: text/xml');
 $twiml = new TwilioTwiml();
 $twiml->say('Your rotary phone is not compatible with this app.');
 $twiml->say('Goodbye.');
 $twiml->hangup();
 return $twiml;
 }
Call Handler switch ($digits) {
 case 1: // Random sound
 echo randomSound();
 break;
 case 2: // Conference call
 echo conferenceCall();
 break;
 case 3: // Random Phrase
 echo fortune();
 break;
 case 4: // Support queue
 echo supportQueue();
 break;
 default:
 ... }
randomSound() function randomSound()
 {
 header('Content-type: text/xml');
 countFailures(-1);
 $sounds = ['gull.mp3', 'lawnmower.mp3',
 'monkey.mp3'];
 $index = array_rand($sounds);
 $twiml = new TwilioTwiml();
 $twiml->play('/sounds/' . $sounds[$index]);
 $twiml->redirect('/twiml/ivr_menu.php');
 return $twiml;
 }
Conference Call function conferenceCall()
 {
 header('Content-type: text/xml');
 $response = new TwilioTwiml();
 $response->say('You have joined the conference.');
 $dial = $response->dial();
 $dial->conference('PHP World');
 return $response;
 }
fortune() function fortune()
 {
 $fortune = `fortune -s`;
 header('Content-type: text/xml');
 $response = new TwilioTwiml();
 $response->sms($fortune);
 $response->say($fortune);
 return $response;
 }
supportQueue() function supportQueue()
 {
 header('Content-type: text/xml');
 $response = new TwilioTwiml();
 if ($_POST['From'] == '<my number>') {
 // Support agent
 $dial = $response->dial();
 $dial->queue('support', ['url' => '/twiml/about_to_connect.php']);
 } else {
 // Enqueue
 $response->enqueue('support');
 }
 
 return $response;
 }
supportQueue() function supportQueue()
 {
 header('Content-type: text/xml');
 $response = new TwilioTwiml();
 if ($_POST['From'] == '<my number>') {
 // Support agent
 $dial = $response->dial();
 $dial->queue('support', ['url' => '/twiml/about_to_connect.php']);
 } else {
 // Enqueue
 $response->enqueue('support');
 }
 
 return $response;
 }
Just Scratching the Surface • Twilio can keep our application informed about how calls are going • We can interact with ongoing calls via the REST API
Questions? • Twitter: @dstockto • Joind.in - https://joind.in/talk/e2e2b
20162016

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Phone calls and sms from php

  • 1.
    Phone Calls andSMS from PHP PHP World 2016 David Stockton November 16, 2016
  • 2.
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  • 15.
    How else canwe receive input and produce output?
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  • 24.
    Let's Send anSMS new TwilioRestClient($config['sid'], $config['token']); Make a client
  • 25.
    Let's Send anSMS $client->messages->create(
 $toNumber,
 array(
 'from' => '+1<purchased#>',
 'body' => $fortune
 )
 );
  • 26.
    All Together $toNumber =$argv[1] ?? '<default #>';
 
 $toNumber = PhpWorld Utility::normalizeNumber($toNumber);
 
 $fortune = $argv[2] ?? `fortune`;
 
 $client->messages->create(
 $toNumber,
 array(
 'from' => '+<purchased #>',
 'body' => $fortune
 )
 );
  • 27.
    How to Use? $php bin/fortune.php $ php bin/fortune.php <destination #> $ php bin/fortune.php <destination #> "Text message from the command line"
  • 28.
  • 29.
  • 30.
    php bin/fortune.php 7206757471"Your account has been created or something."
  • 31.
    What can wedo? • Notifications • Two-Factor Authentication (2FA) • Responses to Queries
  • 32.
    Make a PhoneCall • API Call to Twitter • Twitter contacts URL for instructions
  • 33.
    TwiML • Twilio's MarkupLanguage for controlling phone calls • XML
  • 34.
    TwiML Commands • Say- Read text to the caller • Play - Play an audio file for the caller • Dial - Add another party to the call • Record - Record the caller's voice • Gather - Collect digits the caller types on their keypad • Sms - Send an SMS message during a phone call
  • 35.
    More TwiML • Hangup- Hang up the call • Queue - Add the caller to a queue of callers. • Redirect - Redirect call flow to a different TwiML document. • Pause - Wait before executing more instructions • Reject - Decline an incoming call without being billed. • Message - Send an MMS or SMS message reply
  • 36.
    How Outgoing CallsWork Your App TwilioAPI Call TwiML CalleeTwilio Plays Twiml
  • 37.
    TwiML <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Sayvoice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
  • 38.
    XML <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Sayvoice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
  • 39.
    Root Element <?xml version="1.0"encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
  • 40.
    Commands - Say <?xmlversion="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response>
  • 41.
    <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Sayvoice="woman">Your call is very
 important to us, but not so
 important we'll answer it with
 a human. Please leave a message.
 </Say>
 <Record maxLength="20" playBeep="true"/>
 </Response> Commands - Record
  • 42.
  • 43.
    Let's Make aCall <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="man">
 Due to inclement weather, school
 will be closed tomorrow. Please
 stay home and stay safe.
 </Say>
 </Response>
  • 44.
    The Full File <?phpheader('Content-Type: text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say voice="man" loop="2">
 Due to inclement weather, school
 will be closed tomorrow. Please
 stay home and stay safe.
 </Say>
 </Response>
  • 45.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 46.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 47.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 48.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 49.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 50.
    Tell Twilio WhoTo Call <?php
 require_once __DIR__ . '/../vendor/autoload.php';
 /** @var TwilioRestClient $client */
 $client = require_once __DIR__ . '/../src/PhpWorld/client.php';
 
 $to = PhpWorldUtility::normalizeNumber($argv[1] ?? '+<default #>');
 $from = '+<purchased #>';
 
 $options = [
 'url' => 'http://' . $_SERVER['HTTP_HOST'] . '/twiml/ school_outage.php',
 ];
 
 $client->calls->create($to, $from, $options);
  • 51.
    Phone and SMS Conversations •Twilio is like a well-behaved HTTP client • It uses sessions • We can use session to remember things about the caller or the conversation
  • 52.
    Phone IVR • Givecallers a menu • Look up information • Connect to people • Solve problems • Give answers
  • 53.
    First TwiML <?php header('Content-Type:text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
  • 54.
    <?php header('Content-Type: text/xml');?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response> Greeting
  • 55.
    <?php header('Content-Type: text/xml');?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response> Menu
  • 56.
    Error Handling <?php header('Content-Type:text/xml'); ?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
  • 57.
    Goodbye. <?php header('Content-Type: text/xml');?>
 <?xml version="1.0" encoding="UTF-8"?>
 <Response>
 <Say>
 Thanks for calling my demo IVR. Please
 listen closely as this is the first time
 you've heard this menu.
 </Say>
 <Gather numDigits="1" action="/twiml/process_ivr_menu.php">
 <Say>
 Press 1 to hear a random sound.
 Press 2 to connect to a conference call.
 Press 3 to hear some wisdom.
 Press 4 to be connected to support.
 </Say>
 </Gather>
 <Say>
 I don't understand. Please try again later.
 </Say>
 <Hangup/>
 </Response>
  • 58.
    Now What? • Whatif they press something that's not 1-4? • What if they press 1-4? • Need to figure out what to do next
  • 59.
    Handle ! 1-4 <?php
 require_once__DIR__ . '/../vendor/autoload.php';
 session_start();
 $digits = $_POST['Digits'] ?? 0;
 
 switch ($digits) {
 case 1: // Random sound
 case 2: // Conference call
 case 3: // Random Phrase
 case 4: // Support queue
 default:
 if (countFailures() >= 3) {
 echo bailOnCall();
 return;
 }
 echo badInput();
 return;
 }
  • 60.
    countFailures() function countFailures($count =null)
 {
 $badInput = $count ?? $_SESSION[__FUNCTION__] ?? 0;
 $badInput++;
 $_SESSION[__FUNCTION__] = $badInput;
 return $badInput;
 }
  • 61.
    badInput() function badInput()
 {
 header('Content-type: text/xml');
 $twiml= new TwilioTwiml();
 $twiml->say('That was not a valid selection.');
 $twiml->redirect('/twiml/ivr_menu.php');
 return $twiml;
 }
  • 62.
    bailOnCall() function bailOnCall()
 {
 header('Content-type: text/xml');
 $twiml= new TwilioTwiml();
 $twiml->say('Your rotary phone is not compatible with this app.');
 $twiml->say('Goodbye.');
 $twiml->hangup();
 return $twiml;
 }
  • 63.
    Call Handler switch ($digits){
 case 1: // Random sound
 echo randomSound();
 break;
 case 2: // Conference call
 echo conferenceCall();
 break;
 case 3: // Random Phrase
 echo fortune();
 break;
 case 4: // Support queue
 echo supportQueue();
 break;
 default:
 ... }
  • 64.
    randomSound() function randomSound()
 {
 header('Content-type: text/xml');
 countFailures(-1);
 $sounds= ['gull.mp3', 'lawnmower.mp3',
 'monkey.mp3'];
 $index = array_rand($sounds);
 $twiml = new TwilioTwiml();
 $twiml->play('/sounds/' . $sounds[$index]);
 $twiml->redirect('/twiml/ivr_menu.php');
 return $twiml;
 }
  • 65.
    Conference Call function conferenceCall()
 {
 header('Content-type:text/xml');
 $response = new TwilioTwiml();
 $response->say('You have joined the conference.');
 $dial = $response->dial();
 $dial->conference('PHP World');
 return $response;
 }
  • 66.
    fortune() function fortune()
 {
 $fortune =`fortune -s`;
 header('Content-type: text/xml');
 $response = new TwilioTwiml();
 $response->sms($fortune);
 $response->say($fortune);
 return $response;
 }
  • 67.
    supportQueue() function supportQueue()
 {
 header('Content-type: text/xml');
 $response= new TwilioTwiml();
 if ($_POST['From'] == '<my number>') {
 // Support agent
 $dial = $response->dial();
 $dial->queue('support', ['url' => '/twiml/about_to_connect.php']);
 } else {
 // Enqueue
 $response->enqueue('support');
 }
 
 return $response;
 }
  • 68.
    supportQueue() function supportQueue()
 {
 header('Content-type: text/xml');
 $response= new TwilioTwiml();
 if ($_POST['From'] == '<my number>') {
 // Support agent
 $dial = $response->dial();
 $dial->queue('support', ['url' => '/twiml/about_to_connect.php']);
 } else {
 // Enqueue
 $response->enqueue('support');
 }
 
 return $response;
 }
  • 69.
    Just Scratching theSurface • Twilio can keep our application informed about how calls are going • We can interact with ongoing calls via the REST API
  • 70.
    Questions? • Twitter: @dstockto •Joind.in - https://joind.in/talk/e2e2b
  • 71.