https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=<? echo $token[1]; ?>

$paypal_create_token = post('https://api-3t.paypal.com/nvp',
 array(
  'params' => array(
   'USER' => $paypal_config['user'],
   'PWD' => $paypal_config['password'],
   'SIGNATURE' => $paypal_config['sign'],
   'METHOD' => 'SetExpressCheckout',
   'VERSION' => $paypal_config['version'],
   'REQCONFIRMSHIPPING' => 0,
   'NOSHIPPING' => 1,
   'SOLUTIONTYPE' => 'Sole',
   'LANDINGPAGE' => 'Billing',
   'LOGOIMG' => $protocol.'://'.$host.'/images/logo197x40.png?'.$time,
   'HDRIMG' => $protocol.'://'.$host.'/images/logo.png?'.$time,
   'BRANDNAME' => mb_strtoupper($host),
   'PAYMENTREQUEST_0_AMT' => $amount,
   'PAYMENTREQUEST_0_ITEMAMT' => $amount,
   'L_PAYMENTREQUEST_0_AMT0' => $amount,
   'L_PAYMENTREQUEST_0_NAME0' => $description,
   'PAYMENTREQUEST_0_INVNUM' => $order_id,
   'L_PAYMENTREQUEST_0_NUMBER0' => $order_id,
   'PAYMENTREQUEST_0_PAYMENTACTION' => 'SALE',
   'PAYMENTREQUEST_0_CURRENCYCODE' => 'RUB',
   'EMAIL' => $orders_info['email'],
   'RETURNURL' => $paypal_config['success_url'].'?order_id='.$order_id.'&order_hash='.$order_hash,
   'CANCELURL' => $paypal_config['fail_url'].'?order_id='.$order_id.'&order_hash='.$order_hash,
  )
 )
);

$paypal_create_token_content = $paypal_create_token['content'];

preg_match('/TOKEN=(.*?)&/', $paypal_create_token_content, $token); // получаем token