<?php
  require __DIR__ . "/../../vendor/autoload.php";
  use telesign\sdk\messaging\MessagingClient;
  $customer_id = "6020AF8C-F2B3-4C02-A31C-EA8155A6D68B";
  $api_key = "9lzjq+PNJIh7puIO3rwdH/HTVA9aCYr9RvaYs+oM4hTLxCxuqkoi0He+Xc+4o54tdnQMSkHIq4Rl2HrSoTDOmA==";
  $phone_number = "639758740021";
  $message = "You're scheduled for a dentist appointment at 2:30PM.";
  $message_type = "ARN";
  $messaging = new MessagingClient($customer_id, $api_key);
  $response = $messaging->message($phone_number, $message, $message_type);