gistfile1.php

<?php

// What the cURL looks like (it works):
// curl -i -X POST -H "Content-Type: application/json" -d '{"table_id":"36694","records":[{"First Name":"Heather", "Last Name":"Smith", "Volunteer":"Heather Smith"}]}' https://api.trackvia.com/records?access_token=ODBlYWU2MjkyMTk4N2ZmY2NlMmQwYTZjNTMyNWIzYzRkZDAwYWJhNzYwZjhkNTkwMTc5OGNjNDMxNDE0ZGQyNA

$url = 'https://api.trackvia.com/records/?access_token=' . $token;

$record = array(
    'table_id'      => $matching_table_id,
    'records'       => array(
        'First Name'    => $first_name,
        'Last Name'     => $last_name,
        'Email'         => $email,
        'Program Code'  => $program_record['fields']['ProgCode'],
        'Volunteer'     => $first_name . ' ' . $last_name,
    )
);

$client = new GuzzleClient();
$request = $client->post($url);
$request->setBody(json_encode($record), 'application/json');
$response = $request->send();

// Doesn't work :(