Get related records via REST v10

gistfile1.txt

<?php

// specify the REST web service to interact with
$url = 'http://sugarinstance/rest/v10';

// And admin username/password
$admin_username = '<<admin username>>';
$admin_password = '<<admin password>>';

// And account id you want to get the related docs for
$account_id = '<<account id>>'

/**
  * Authenicate and get back token
  */
$curl = curl_init($url . "/oauth2/token");
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

// Set the POST arguments to pass to the Sugar server
$rawPOSTdata = array(
    "grant_type" => "password",
    "username" => $admin_username,
    "password" => $admin_password,
    "client_id" => "sugar",
    "client_secret" => "",
    "platform" => "base",
    );
curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($rawPOSTdata));
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 

// Make the REST call, returning the result
$response = curl_exec($curl);
if (!$response) {
    die("Connection Failure.\n");
}

// Convert the result from JSON format to a PHP array
$result = json_decode($response);

curl_close($curl);

$token = $result->access_token;

/**
  * Subsequent call to related Documents to the give Account record
  */

// Open a curl session for making the call
$curl = curl_init($url . "/Accounts/{$account_id}/link/documents");
curl_setopt($curl, CURLOPT_POST, false);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json',"OAuth-Token: $token")); 

// Make the REST call, returning the result
$response = curl_exec($curl);
if (!$response) {
    die("Connection Failure.\n");
}

// Convert the result from JSON format to a PHP array
$results = json_decode($response);

curl_close($curl);

var_dump($results)