$userName = "name";
$password = "pass";
$orderNumber = md5(uniqid(rand(),1));
$amount = 99000;
$returnUrl = "http://site.com/?succes";
 $curl = curl_init();
curl_setopt($curl, CURLOPT_URL, 'https://3dsec.sberbank.ru/payment/rest/register.do');
curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_POSTFIELDS, 'amount='.$amount.'&currency=810&language=ru&orderNumber='.$orderNumber.'&returnUrl='.$returnUrl.'&jsonParams={"orderNumber":'.$orderNumber.'}&pageView=DESKTOP&expirationDate
=2014-09-08T14:14:14&merchantLogin=merch_child');
$out = curl_exec($curl);
echo $out;
curl_close($curl);