Duda con el formulario de pago de Paypal

[PHPcool]

No no es usando curls...mira que fácil

Código PHP:

<?php
    // Prepare GET data
    $query = array();
    $query['notify_url'] = 'http://madarauchiha.com/ipn';
    $query['cmd'] = '_cart';
    $query['upload'] = '1';
    $query['business'] = '[email protected]';
    $query['address_override'] = '1';
    $query["item_name_1"] = "asas";
    $query["quantity_1"] = "2";
    $query["amount_1"] = "15";
 
    // Prepare query string
    $query_string = http_build_query($query);
    
    header('Location: https://www.paypal.com/cgi-bin/webscr?' . $query_string);
 
?>