Issues creating a PHP webhook for Twilio - php

Question

So I have the following CURL command in PHP, if I send it https://webhook.site I can extract all the required data in JSON format.
Instead of using webhook.site, I would like to create my own PHP webhook client.
The code below is the CURL command that works 100% when using webhook.site:
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => 'https://webhook.site/832090f1-f54f-4847-8c0d-5ec9208541a1',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'POST',
CURLOPT_POSTFIELDS => array('SmsSid' => 'SMe8723661742d423fbf3fa9f7bbede050','SmsStatus' => 'sent','MessageStatus' => 'sent','ChannelToAddress' => '+1788123XXXX','To' => 'whatsapp:[phone]','ChannelPrefix' => 'whatsapp','MessageSid' => 'SMe8723661742d423fbf3fa9f7bbede050','AccountSid' => 'AC306a09582e77715b0eb72df90de4c590','StructuredMessage' => 'false','From' => 'whatsapp:+154xxxxxx','MediaUrl0' => 'https://api.twilio.com/2010-04-01/Accounts/werwersdsdg72df90de4c590/Messages/wweugryuwyr7762b11ea/Media/wjeruwiy6243742
'),
CURLOPT_HTTPHEADER => array(
'user-agent: TwilioProxy/1.1',
'host: Postman'
),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;
I then tried to use PHP to create a basic webhook just to pull the data:
<?php
if($json = json_decode(file_get_contents("php://input"), true)){
$data = $json;
$fp = file_put_contents( 'request.log', $data );
}
print_r($data);
?>
But I keep coming with a blank request.log file - what am I doing wrong??? Thanks in advance

Answer 1

Twilio developer evangelist here.
By default, curl will make a POST request with the Content-Type header application/x-www-form-urlencoded. This is actually the same content type that Twilio uses when it sends a webhook request.
Your PHP to receive the request is trying to json_decode the data, which won't work with form encoded data. Instead, you can access $_POST to get an associative array of the parameters sent to your script. You can then write them to a log file however you like.