RingCentral REST API Correct method of posting data? - php

Question

I'm trying to send a request to the RingCentral API to trigger an SMS message to be sent. I've read the documentation and it appears as though I'm posting all of the data in the correct format but I'm getting an error of "Unsupported Media Type".
Does anyone see anything wrong with my code, or is do any of you guys have experience with this API?
$data = array("from" => "[phone]", "to" => "[phone]", "text" => "test_sms_message");
$data_string = json_encode($data);
$ch = curl_init('https://platform.devtest.ringcentral.com/restapi/v1.0/account/~/extension/~/sms');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$headers = array();
$headers[] = "Authorization: Bearer ".$auth_token;
$headers[] = "Accept: application/json";
$headers[] = "Content-Type: application/x-www-form-urlencoded";
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$result = curl_exec($ch);
print_r($result);

Answer 1

So I'm going to post an answer to my own question and include the entire code I used. This code will allow you to get an authorization token first and then use that token to send a request to the RingCentral REST API. I couldn't find a working PHP example anywhere online so I'm sure this will help someone else out there.
<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://platform.devtest.ringcentral.com/restapi/oauth/token");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "username=+1XXXXXXXXX&password=XXXXXXXXX&extension=XXX&grant_type=password");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_USERPWD, "XXXXXXXXXXXX" . ":" . "XXXXXXXXXXXXXXXXX");
$headers = array();
$headers[] = "Accept: application/json";
$headers[] = "Content-Type: application/x-www-form-urlencoded";
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$result = curl_exec($ch);
$decoded_results = json_decode($result, true);
if (curl_errno($ch)) {
echo 'Error:' . curl_error($ch);
}
echo '<pre>';
print_r($result);
curl_close ($ch);
$auth_token = $decoded_results['access_token'];
// LINE BREAK
$data_string = '{"to": [{"phoneNumber": "+INSERTNUMBER"}],"from": {"phoneNumber": "+INSERTNUMBER}"},"text": "Test SMS message from Platform server"}';
$ch = curl_init('https://platform.devtest.ringcentral.com/restapi/v1.0/account/~/extension/~/sms');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$headers = array();
$headers[] = "Authorization: Bearer ".$auth_token;
$headers[] = "Accept: application/json";
$headers[] = "Content-Type: application/json";
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$result = curl_exec($ch);
print_r($result);