<?php require_once "./plivo.php"; $auth_id = "Your AUTH_ID"; $auth_token = "Your AUTH_TOKEN"; $p = new RestAPI($auth_id, $auth_token); $plivo_number = "1111111111"; $params = array('to' => '1111111111<2222222222', 'from' => $plivo_number, 'answer_url' => "https://glacial-harbor-8656.herokuapp.com/testing.php/response/conference", 'answer_method' => "GET"); $response = $p->make_call($params); print_r($response); /* Sample Output ( [status] => 201 [response] => Array ( [api_id] => 8b32b934-af6e-11e4-b153-22000abcaa64 [message] => calls fired [request_uuid] => Array ( [0] => d1187266-b5e8-4a1d-bd8d-b0a4395f08f6 [1] => 0c88ed10-fde4-4e6e-8c7c-08ebeee5e856 ) ) ) */