Send message button in facebook bot PAGE - php

Question

good evening,
I'm already breaking my head for 3 days I'm trying to send a message with the button from a page with a bot made in CURL PHP
I'm trying with CURL and PHP POST GRAPH
without success both of us can help me?
function SendRawResponse($Rawresponse){
$userPageConversation = 't_100005050355547';
$Access_token = "XXXX";
$url = "https://graph.facebook.com/v2.6/".$userPageConversation."/messages?access_token=".$Access_token;
//$url = "https://graph.facebook.com/v2.6/me/messages?access_token=".$Access_token;
$ch = curl_init($url);
$headers = array(
'Content-Type: application/x-www-form-urlencoded',
'charset=utf-8',
);
//curl_setopt($ch, CURLOPT_POSTFIELDS, $Rawresponse);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($Rawresponse));
//curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($Rawresponse));
curl_setopt($ch, CURLOPT_POST, true);
//curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_exec($ch);
$erros = curl_errno($ch);
$response = curl_getinfo($ch, CURLINFO_HTTP_CODE);
var_dump($erros);
var_dump($response);
curl_close($ch);
}
Mensage:
$teste = '{
"message":{
"attachment":{
"type":"template",
"payload":{
"template_type":"button",
"text":"Try the postback button!",
"buttons":[
{
"type":"web_url",
"title":"GOOGLE",
"url":"https://www.google.com.br"
}
]
}
}
}}';
SendRawResponse($teste);
erros:
Warning: http_build_query(): Parameter 1 expected to be Array or Object. Incorrect value given
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($Rawresponse)); = Missing message body

Answer 1

According to the docs
you must add domain to the whitelist in FB page settings.
Domains must meet the following requirements to be whitelisted:
Served over HTTPS
Use a fully qualified domain name, such as
https://www.messenger.com/. IP addresses and localhost are not
supported for whitelisting.