retrieve-modify.php

<?php
use Symfony\Component\Dotenv\Dotenv;
require('vendor/autoload.php');

$dotenv = new Dotenv();
$dotenv->load(__DIR__.'/.env');

$rcsdk = new RingCentral\SDK\SDK(getenv('RINGCENTRAL_CLIENT_ID'),
                                 getenv('RINGCENTRAL_CLIENT_SECRET'),
      	                         getenv('RINGCENTRAL_SERVER_URL'));

$platform = $rcsdk->platform();
try {
  $platform->login( getenv('RINGCENTRAL_USERNAME'),
                    getenv('RINGCENTRAL_EXTENSION'),
                    getenv('RINGCENTRAL_PASSWORD'));

  $params = array(
      'readStatus' => "Unread"
  );
  $r = $platform->get('/account/~/extension/~/message-store', $params);
  $records = $r->json()->records;
  $count = count($records);
  print_r("We get a list of {$count} messages\n");
  foreach ($records as $record){
    $messageId = $record->id;
    $params['readStatus'] = "Read";
    $r = $platform->put("/account/~/extension/~/message-store/{$messageId}", $params);
    $readStatus = $r->json()->readStatus;
    print_r("Message read status has been changed to {$readStatus}\n");
  }
}catch (\RingCentral\SDK\Http\ApiException $e) {
  print 'Expected HTTP Error: ' . $e->getMessage() . PHP_EOL;
}