Example for Stack Overflow question: http://stackoverflow.com/questions/36724730/cannot-display-an-overview-of-this-response-error-in-nexmo/36729404

stackoverflow-example-nexmo-loop.php

<?php

use Nexmo\Developer;
use Nexmo\Insight;
use Nexmo\Sms;
use Nexmo\Verify;
use Nexmo\Voice;

/*
 * Get an SMS client object
 */
$sms = new Sms([
    'api_key' => 'somekey',
    'api_secret' => 'somesecret',
]);

/*
 * My nexmo number to send from
 */
$myPhone = '11231231234';

/*
 * Phone numbers to send message to
 */
$phoneNumbers = [
    '1231231233', '2342342345', '3453453456',
];

/*
 * Message to be sent
 */
$message = 'Well hello there';

/*
 * Send messages to each
 */
foreach ($phoneNumbers as $toPhone) {
    $sms->send([
        'from' => $myPhone,
        'to' => $toPhone,
        'text' => $message,
    ]);
}