// Notes: 

This is in by no means a full implimentation of PayPals NVP API.
I have only written methods for what I needed. They are simple to
implement. 

You can do whatever you like this this code.

I only have interfaces for,

Setting API Version (You can also do when creating object)
-SetAPIVersion(str)

Setting End point (Useful if you want to test in sandbox)
-SetEndPoint(str)

Setting EC End point (Useful if you want to test in sandbox)
-SetECEndPoint(str)

DoDirectPayment(array)
DoCapture(array)
SetExpressCheckout(array)
GetExpressCheckout(str) //Takes a token
DoExpressCheckout(array)


- All methods will return an object, I will give you back everything PayPal does according to the API version you are using


Two methods will return non standard variables,

-- SetExpressCheckout
--- CLEAN_TOKEN is just a urldecoded token
--- CHECKOUT_URL is the link you need to redirect the user to for paypal to process

-- GetExpressCheckout
--- CLEAN_TOKEN same as above



// Validation:

I try to validate the required fields decently. You still should be watching for throws
as well as checking the PayPal responses


/////////////////////////////////////////////////////////////////////////////////////
//  Basic usage example
////////////////////////////////////////////////////////////////////////////////////

$pp = new PayPalNVP(array(
    'UserName'	=> 'seller_139441_biz_api1.gmail.com',
    'Password'	=> '130689946',
    'Signature' => 'AYBgIuot3ZEeAX6OGYqN7crDHtyexHvRJ43R9Bk1'
));

$details = array(
    'AMT'	     => '50.02',
    'ZIP'	     => '11566',
    'CITY'	     => 'Merrick',
    'CVV2'	     => '000',
    'ACCT'	     => '476819606062564',
    'STATE'	     => 'NY',
    'STREET'	     => '1 Flower Drive',
    'EXPDATE'	     => '052012',
    'LASTNAME'	     => 'Tsafas',
    'FIRSTNAME'	     => 'George',
    'COUNTRYCODE'    => 'US',
    'CREDITCARDTYPE' => 'VISA',
    'PAYMENTACTION'  => 'Authorization'

);


try 
{
    $transaction = $pp->DoDirectPayment($details);
} 
catch (Exception $e) 
{
    echo $e->getMessage();
}


$details = array(
    'AUTHORIZATIONID'	=> $transaction->TRANSACTIONID,
    'AMT'		=> $transaction->AMT,
    'CURRENCYCODE'	=> 'USD',
    'COMPLETETYPE'	=> 'Complete'
);

try
{
    $capture = $pp->DoCapture($details);
}
catch (Exception $e)
{
    echo $e->getMessage();
}


////////////////////////////////////////////////////////////////////////////////