limits.php

<?php

include('softlayer-api-php-client/SoftLayer/SoapClient.class.php');

$apiUser = '';
$key = '';

$accountClient = SoftLayer_SoapClient::getClient('SoftLayer_Account', null, $apiUser, $key);
$objectMask = "mask[id,modifyDate]";
$accountClient->setObjectMask($objectMask);
$tickets = $accountClient->getTickets();
$limit = 10;
$offset = 0;
$allTickets = array();

while (TRUE) {
    $accountClient->setResultLimit($limit, $offset);
    $tickets = $accountClient->getTickets();
    if (count($tickets) < 1)
        break;

    $allTickets = array_merge($allTickets, $tickets);
    $offset += $limit;
}

print_r($allTickets);