Omettendo tutto il resto degli script focalizzo l'attenzione unicamente sulle funzioni incriminate cercando di descrivere tutto al meglio.

1. La funzione "voucherInfo" richiama da remoto la funzione "CheckVoucher".
   [PHP]function voucherInfo($username, $code){
   global $cfg;
   if($username){
   $xmws = new xmwsclient();

    $xmws->InitRequest($cfg['panel_url'], 'xbilling', 'CheckVoucher', $cfg['api_key']);
    $xmws->SetRequestData('<zpx_user>' .$username. '</zpx_user>');
   
    $res = $xmws->XMLDataToArray($xmws->Request($xmws->BuildRequest()));
   
    if ($res['xmws']['response'] != '1101') {
        die("API Error: " . $res['xmws']['content']);
    }
   return $res['xmws']['content']['voucher'];
   

// var_dump($res);
}
}
[/PHP]
2) La funzione "CheckVoucher" richiama in locale la funzione "getVoucher" che va ad estrapolare i dati dal db.
[PHP]
public function CheckVoucher(){

    $zpx_user = '';
    $request_data = ws_generic::XMLToArray($this->wsdata);
    if(isset($request_data['xmws']['content']['zpx_uid']) && isset($request_data['xmws']['content']['voucher'])){
        $zpx_user = $request_data['xmws']['content']['zpx_uid'];
        $code = $request_data['xmws']['content']['voucher'];
    }
    
    //die(var_dump($request_data));
    

    if($zpx_user && $code){
        $response_xml = "\n";
        $voucher_info = module_controller::getVoucher($zpx_user, $code);
        
        //die(var_dump($voucher_exists));
        
        if ($voucher_info){
                $discount_type = 'Once-Off';
        if($voucher_info['discount_type'] == 2){
            $discount_type = 'Recurring';
        }
            $voucher_check['voucher_exists'] = $voucher_exists;
             $voucher = array('id' => $voucher_info['voucher_id'], 'code' => $voucher_info['voucher_code'], 'discount' => $voucher_info['discount'], 'type' => $discount_type);
             $response_xml = $response_xml . ws_xmws::NewXMLContentSection('result', $voucher);
        }

        $dataobject = new runtime_dataobject();
        $dataobject->addItemValue('response', '');
        $dataobject->addItemValue('content', $response_xml);

        return $dataobject->getDataObject();
    }
}

public function GetPackageName(){
    $pkg_name = '';
    $pkg_id = 0;
    $request_data = ws_generic::XMLToArray($this->wsdata);
    if(isset($request_data['xmws']['content']['package_id'])){
        //$zpx_uid = $request_data['xmws']['content']['zpx_uid'];
        $pkg_id = $request_data['xmws']['content']['package_id'];
    }
    

    if($pkg_id){
        $response_xml = "\n";
        $pkg_name = module_controller::GetPackageName($pkg_id);
        
        if (!fs_director::CheckForEmptyValue($pkg_name)) {
            $package['name'] = $pkg_name;
             $response_xml = $response_xml . ws_xmws::NewXMLContentSection('package', $package);
        }

        $dataobject = new runtime_dataobject();
        $dataobject->addItemValue('response', '');
        $dataobject->addItemValue('content', $response_xml);

        return $dataobject->getDataObject();
    }   
}

[/PHP]
3) Qui lo script eseguito dalla funzione "CheckVoucher".
[PHP]
static function getVouchers(){
global $zdbh;
$currentuser = ctrl_users::GetUserDetail();
$vouchers = $zdbh->prepare("SELECT * FROM ".self::$module_db.".x_vouchers
WHERE reseller_ac_id_fk=:user_id
AND voucher_deleted_ts IS NULL;");
$vouchers->bindParam(':user_id', $currentuser['userid']);
$vouchers->execute();
$res = array();
if (!fs_director::CheckForEmptyValue($vouchers)) {
while ($row = $vouchers->fetch()) {
$active_text = '<span class="label label-danger">No</span>';
if($row['active_yn'] == 1){
$active_text = '<span class="label label-success">Yes</span>';
}

           $usage_type = 'N/A';
           if($row['usage_type'] == 1){
               $usage_type = 'Once';
           } elseif($row['usage_type'] == 2){
               $usage_type = 'Multiple';
           }

           $discount_type = 'N/A';
           if($row['discount_type'] == 1){
               $discount_type = 'Once-Off';
           } elseif($row['discount_type'] == 2){
               $discount_type = 'Recurring';
           }

/* //usages
$total_usages = 0;
$sql = "SELECT COUNT(*) AS total_usages FROM ".self::$module_db.".x_invoices
WHERE invoice_voucher_id=:id AND invoice_deleted_ts IS NULL";
$numrows = $zdbh->prepare($sql);
$numrows->bindParam(':id', $row['voucher_id']);
if ($numrows->execute()) {
$voucher_usages = $numrows->fetch();
$total_usages = $voucher_usages['total_usages'];
}
*/

           array_push($res, array('code' => $row['voucher_code'],
                                  'discount' => $row['discount'],
                                  'type' => $row['voucher_code'],
                                  'active_text' => $active_text,
                                  'usage_type_text' => $usage_type,
                                  'discount_type_text' => $discount_type,
                                  'total_usages' => self::getVoucherUsages($row['voucher_id']),
                                  'id' => $row['voucher_id']));  
        }
        return $res;
    } else {
        return false;
    }            
}  

[/PHP]
Dando per scontato che le funzioni di cui ai punti 2 e 3 funzionino a dovere poiché preesistenti, il mio problema è che non riesco ad ottenere i dati utilizzando lo script fatto da me al punto 1.

Spero che qualcuno riesca a darmi una mano.
Saluti