SNS service does not send SMS V3 API - php

Question

I tried to use the V2 API to send SMS in the SNS service, and it worked, but it obligated me to create a topic and a subscription with the cellphone number target.
The documentation tells that i am not obligated to create a topic and subscription for the destination cellphone number to send SMS, so i discovered that i must use V3 API to send SMS without TopicARN obligation.
After to use a PHP server with 5.5 version, and V3 API, the TOPIC ARN was not asked, but it took so much time, more than 1 minute, and i got the 503 error as server response, there is no error on log_error.
Could you try to help me?
The code i used and worked on V2 but not V3:
require 'aws-autoloader.php';
use Aws\Sns\SnsClient;
$snsClient = SnsClient::factory(array(
'key' => 'mykey',
'secret' => 'mysecret',
'version' => 'latest',
'region' => 'us-west-2'
));
$destination = array('+number'); // this way works on V2, but not on V3
//$destination = '+number'; // tried like this too
try {
$resp = $snsClient->publish(array(
'PhoneNumber' => $destination,
'Message' => utf8_encode('Message')
));
echo $resp->get('MessageId');
} catch(Exception $e)
{
echo $e->getMessage(); // I didn´t get exception, i got server error 503
}

Answer 1

I found the problem, after the start to use the PHP API V3 i must start like this:
$snsClient = SnsClient::factory(array(
'version' => 'latest',
'region' => 'us-west-2',
'credentials' => array(
'key' => 'mykey',
'secret' => 'mysecret',
)
));
But i still with problems, i receive this message:
Error executing "Publish" on "https://sns.us-west-2.amazonaws.com"; AWS HTTP error: Client error: POST https://sns.us-west-2.amazonaws.com resulted in a 400 Bad Request response: Sender InvalidPara (truncated...) InvalidParameter (client): Invalid parameter: TopicArn or TargetArn Reason: no value for required parameter - Sender InvalidParameter Invalid parameter: TopicArn or TargetArn Reason: no value for required parameter
I didn´t set up the TopicARN or TargetARN because i don´t want to create a subscription for each target number, and the documentation tells me that i can send for a number without register it.
Any help?

Answer 2

When sending SMS you don't need TopicArn. Just do like this:
First install aws/aws-sdk-php. Using composer:
composer require aws/aws-sdk-php
Create a php file with:
require './vendor/autoload.php';
error_reporting(E_ALL);
ini_set("display_errors", 1);
$params = array(
'credentials' => array(
'key' => 'YOUR_KEY_HERE',
'secret' => 'YOUR_SECRET_HERE',
),
'region' => 'us-east-1', // < your aws from SNS Topic region
'version' => 'latest'
);
$sns = new \Aws\Sns\SnsClient($params);
$args = array(
"SenderID" => "SenderName",
"SMSType" => "Transational",
"Message" => "Hello World! Visit www.tiagogouvea.com.br!",
"PhoneNumber" => "FULL_PHONE_NUMBER"
);
$result = $sns->publish($args);
echo "<pre>";
var_dump($result);
echo "</pre>";
The result must have one array with many data, including MessageId.