How to send custom message before, proxy session send actual message - php

Question

When Customer replies to proxy service reserved number then proxy hit an OutOfSessionCallbackUrl(if a session is not active).
That URL will come to my code below.
public function response()
{
$to = $_POST['To'];
$from = $_POST['From'];
$from = substr($from, 2);
$body = $_POST['Body'];
$twilio = new Client($this->sid, $this->token);
$response=$this->db->get_where('contact_management as cm
,proxy_service as ps',
array('mobile'=>$from,'company_mobile'=>$to,'sc.sms_template_id<>'=>0))
->row_array();
$number = trim($response['country_code'].$response['mobile_number']);
//Here I'm sending a response
header("content-type:application/json");
?>
{
"uniqueName": "<?php echo rand();?>",
"ttl":"64800",
"mode": "voice-and-message",
"participantIdentifier":"<?php echo $number;?>"
}
<?php
}
This will create a session between SMS sender and returned number(company) and send the message of the sender to the company. I want to send a custom message before Twilio proxy send actual message to the company.
Thanks.

Answer 1

Twilio developer evangelist here.
Currently you are using the out of session callback in order to create a session, but you want to send a message before you forward on the incoming message.
To do this, you won't be able to respond with the JSON to create a session. Instead, you should create the session manually using the session API. Once you have created a session you can then send your initial message by creating an interaction on the participant you want to send the message to. You can then follow up by using the same API to forward the original message. And finally you still need to respond to the webhook. Since you handled all the message sending manually, you can return an empty TwiML <Response/> to signify that you need Twilio to take no further part.
Let me know if that helps at all.

Answer 2

Here Are the complete Description.
I have add Twilio number as reserved in proxy service and set the proxy service OutOfSessionCallbackUrl.When this URL reach my code then the magic happens,
public function response()
{
$to = $_POST['To'];
$from = $_POST['From'];
$twilio = new Client($this->sid, $this->token);
$response=$this->db->get_where('contact_management ,proxy_service,
array('mobile'=>$from,'company_mobile'=>$to))->row_array();
$service_sid=$response['service_sid'];
$session = $twilio->proxy->v1->services($service_sid)->sessions
->create(array("uniqueName" => rand(),"ttl"=>"64800"));
$session_sid = $session->sid;
$participant1 = $twilio->proxy->v1->services($service_sid)
->sessions($session_sid)->participants->create($_POST['From'], // identifier
array("friendlyName" => $response['f_name'],"proxyIdentifier"=>$to));
$from_id = $participant1->proxyIdentifier;
$participant2 = $twilio->proxy->v1->services($service_sid)
->sessions($session_sid)->participants
->create($response['country_code'].$response['mobile_number'], // identifier
array("friendlyName" => $response['first_name']));
$to_id = $participant2->proxyIdentifier;
$to_sid = $participant2->sid;
$body = $response['campaign_name']."\n";
$body .= $_POST['Body'];
$message_interaction = $twilio->proxy->v1->services($service_sid)
->sessions($session_sid)
->participants($to_sid)
->messageInteractions
->create(array("body" => $body));
header("content-type:text/xml");
?>
<Response />
<?php
}