Twilio Programmable Voice isn't working

Question

When i try to pass param from my application using [TwilioVoice Call] method i am not able to get those param on twiML application. but when i try to pass same data from POSTMAN with FormData its working fine and also successfully able to create call.

Would you please help me how can i use param passed from my iOS application into twiML

TwiML Application in PHP :

<?php
/*
 * Makes a call to the specified client using the Twilio REST API.
 */
include('./vendor/autoload.php');
include('./config.php');
$to = isset($_GET["to"]) ? $_GET["to"] : "";
if (!isset($to) || empty($to)) {
    $to = isset($POST["to"]) ? $_POST["to"] : "";
}
$from = isset($_GET["from"]) ? $_GET["from"] : "";
if (!isset($from) || empty($from)) {
    $from = isset($POST["from"]) ? $_POST["from"] : "";
}

use Twilio\Twiml;
$response = new Twiml();
$dial = $response->dial(['callerId' => $from]);
$dial->client($to);
echo $response;

iOS Objective-C :

self.call = [TwilioVoice call:[self fetchAccessToken]
                           params:@{@"to": @"1",@"from":@"2"}
                             uuid:uuid
                         delegate:self];

Twilio Error Log when i try to pass param from iOS

Warning - 13224 Dial: Twilio does not support calling this number or the number is invalid

Reference TwiML Application Code

https://github.com/twilio/voice-quickstart-server-php

Answer 1

Step 1. In the name you have to pass name of the user(any thing you want)

Step 2. You need to generate token using 3 parameters

Step 3. You need to create object of VoiceGrant

Step 4. You need to pass Id

Step 5. You need to set PUSH notification Id generate from twilio

$name = $this->input->post('name');
            //$PUSH_CREDENTIAL_SID = 'CRaf1a66dd4a7656876e16c7820ef5c01e';
             $outgoingApplicationSid = 'APf9b1b789ba690b8789d95a42511f2018';
              // choose a random username for the connecting user
             $identity = $name;
             // Create access token, which we will serialize and send to the client


             $token = new AccessToken(
             $this->twilioAccountSid,
             $this->twilioApiKey,
             $this->twilioApiSecret,
             3600,
             $identity
              );
          //     $chatGrant = new ChatGrant( $pushCredentialSid= "CRaf1a66dd4a7656876e16c7820ef5c01e");
          //
          // print_r($chatGrant);die;
             // Create Chat grant
             // $voiceGrant = new VoiceGrant($serviceSid = 'IS840a7e5f64634ab6bf179c3f8b0adfc4',$pushCredentialSid = 'CRaf1a66dd4a7656876e16c7820ef5c01e');
             $voiceGrant = new VoiceGrant();
             $voiceGrant->setOutgoingApplicationSid($outgoingApplicationSid);

             // Optional: add to allow incoming calls
             $voiceGrant->setIncomingAllow(true);

             $voiceGrant->setPushCredentialSid('CRaf1a66dd4a7656876e16c7820ef5c01e');


             // Add grant to token
             $token->addGrant($voiceGrant);

             // render token to string
            $voice_token = $token->toJWT();
             if($voice_token){
                $data['token'] = $voice_token;
                 $this->response = array('status'=>1,'data'=>$data);
             }else{
                 $this->response = array('status'=>0,'message'=>'Not found');
             }

Answer 2

Twilio developer evangelist here.

The 12100 error comes from Twilio not being able to parse the TwiML returned from your server. In this case, it is because your PHP is not returning TwiML, it's trying to make a call using the REST API.

It should return a <Dial> with a nested <Client>. You can build this up using the helper library too. Try changing your code to this:

<?php
    include('./vendor/autoload.php');
    include('./config.php');

    $to = isset($_REQUEST["To"]) ? $_REQUEST["To"] : "";
    $to = str_replace("client:", "", $to);

    $from = isset($_REQUEST["From"]) ? $_REQUEST["From"] : "";

    use Twilio\Twiml;

    $response = new Twiml();
    $dial = $response->dial(['callerId' => $from]);
    $dial->client($to);

    echo $response;

Let me know if that helps.