Get (retrieve) banner codes via API (only for affiliates)

<?php
define('URL_TO_PAP','https://URL_To_PostAffiliatePro'); //URL to Post Affiliate Pro (network) without any trailing slash
define('AFFILIATE_USERNAME','affiliate@example.com'); //affiliate username
define('AFFILIATE_PASSWORD','demo'); //affiliate password
define('API_FILE','PapApi.class.php'); 
//the PapApi.class.php file can be downloaded in the merchant panel: Tools>Integration>API Integration>Download PAP API
//make sure the PapApi.class.php file is uploaded in the same directory as this script itself.

$session = papAffiliateLogin();
if (!$session){
    die('Banner codes cannot be obtained due to failed login attempt');
}

$bannerCodes = getBannerCodes($session); //obtaining the banner codes as a genric HTML code that is directly executed
$bannerCodesNeatCode = getBannerCodes($session,'Y'); //utlizing https://php.net/htmlspecialchars
if ($bannerCodes) {
foreach ($bannerCodes as $code){
    echo $code."<hr>";
    }    
}
if ($bannerCodesNeatCode) {
foreach ($bannerCodesNeatCode as $code){
    echo $code."<hr>";
    }    
}

/*definition of functions to be used*/
function papAffiliateLogin(){
    try {
        include_once API_FILE;
        $session = new Pap_Api_Session(URL_TO_PAP."/scripts/server.php"); 
        if(!$session->login(AFFILIATE_USERNAME, AFFILIATE_PASSWORD, Gpf_Api_Session::AFFILIATE)) { //change it here for affiliate username and password
            die("Cannot login. Message: ".$session->getMessage());
            return;        
        }
        return $session;
    } catch (Exception $e){
        die('Error: '.$e->getMessage());        
        return;
    }
}

function getBannerCodes($session,$htmlSpecialChars=NULL){
    $bannerCodes = array();
    //----------------------------------------------
    // get recordset with list of banners
    $request = new Gpf_Rpc_Gridrequest("Pap_Affiliates_Promo_BannersGrid","getRows",$session);
    // sets limit to 30 rows, offset to 0 (first row starts)
    $request->setLimit(0, 30);
    // Filter particular banner type(s); A = link banner, E =  promo email, F = flash, H = HTML, I = image, V = Simple PDF, T = Text-Link
    //$request->addFilter('rtype',Gpf_Data_Filter::EQUALS,'E'); 
    //$request->addFilter('id',Gpf_Data_Filter::EQUALS,'11110001');  // use this for filtering exact banner ID
    // send request in a loop to load all records
    do {
        try {
            $request->sendNow();
        } catch(Exception $e) {
            die("API call error: ".$e->getMessage());
        }
        // request was successful, get the grid result and its recordset
        $recordset = $request->getGrid()->getRecordset();
        // iterate through the records and fill in the results array
        foreach($recordset as $rec) {                    
            if(isset($htmlSpecialChars) && $htmlSpecialChars == 'Y'){
                $bannerCodes[] = htmlspecialchars($rec->get('bannercode'));
            } else {
                $bannerCodes[] = $rec->get('bannercode');
            }
        }
    } while ($recordset->getSize() == $request->getLimit());
    return $bannerCodes;
}
?>