RSform! Pro PayPal Integration

if (isset($_POST['form']['amount']))
{
 $business = 'me@mybusiness.com';
 $item_name = 'Team In Training';
 $currency_code = 'USD';
 $amount = $_POST['form']['amount'][0];
 header('Location: https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business='.$business.'&item_name='.$item_name.'&currency_code='.$currency_code.'&amount='.$amount);
 exit();
}

$amount = $_POST['form']['amount'][0];

$amount = '119.99';

$amount = $_POST['form']['amount'];

if (isset($_POST['myform']['amount']))
{
$business = 'myemail@email.com';
$item_name = 'Team In Training';
$currency_code = 'USD';
$amount = 100.00;
header('Location: https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business=';.$business.'&item_name='.$item_name.'&currency_code='.$currency_code.'&amount='.$amount);
exit();
}

// the following line allows other script fragments to address the form by its name (not actually used in 
// this example but a useful trick !
 
$formLayout = str_replace('method="post"','method="post" name="yourformname"', $formLayout);

if($_POST['form']['amount'] != '0')					// "amount" is a text box. IS there actually a value to be donated ?
{
 $business = 'yourbusiness@yourdomain.com';			// this is the email address of your PayPal account
 $item_name = 'nameofitem';							// this is how you want your donation to be named eg "Donation to MyCharity"
 $currency_code = 'GBP';
 $amount = $_POST['form']['amount'];				// retrieve the amont of the donation from the form
 
 // examine the gift-aid checkbox to see if it is checked and set the result in a string that we will pass to PayPal as a 
 // custom variable. Same technique could be used for many things
 
 if (isset($_POST['form']['gift_aid'][0])) {
    $custom = "Gift Aid = Yes";
 }
  else
 {
    $custom = "Gift Aid = No";
 }    
 
 // set up some more info that PayPal needs 
 $return = "http://www.yoursite.com/returnpage.htm";		// this is the page you want to come back to on successful PayPal payment
 $rm = "2";              									// Return Method 2 returns variables as POST
 $cancel = "http://www.yoursite.com/paymentcancelled";		// return page if the user did not complete the PayPal transaction
 $cbt = "Return to the Name of Your Site";					// this is the text that appears on the return button on PayPal
 
 //	the following line transfers control to PayPal with all of the above information
 header('Location: https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business='.$business.'&item_name='.$item_name.'&currency_code='.$currency_code.'&amount='.$amount.'&custom='.$custom.'&return='.$return.'&rm='.$rm.'&cancel='.$cancel.'&cbt='.$cbt); exit();
}

// much of what follows is just standard Joomla code that I grabbed from the documentation
 
$mailer =& JFactory::getMailer();
$config =& JFactory::getConfig();
$sender = array( 
    $config->getValue( 'config.mailfrom' ),
    $config->getValue( 'config.fromname' ) );
 
$mailer->setSender($sender);
//$user =& JFactory::getUser();
//$recipient = $user->email;
$recipient = "yourwebsiteadmin@yourdomain.com"; 
$mailer->addRecipient($recipient);
 
// if you wanted to add some other recipients then this is how
//$recipient = array( 'person1@domain.com', 'person2@domain.com', 'person3@domain.com' );
//$mailer->addRecipient($recipient);
 
// Get variables returned from PayPal
$firstname = JRequest::getVar('first_name');
$lastname = JRequest::getVar('last_name');
$addressname = JRequest::getVar('address_name');
$street = JRequest::getVar('address_street');
$city = JRequest::getVar('address_city');
$email = JRequest::getVar('payer_email');
$amount = JRequest::getVar('mc_gross');
$currency = JRequest::getVar('mc_currency');
$giftaid = JRequest::getVar('custom');					// this is the custom field that we passed to PayPal from the Donation page and tells me if the donation is Gift-Aided or not.
$fee = JRequest::getVar('mc_fee');
$item = JRequest::getVar('item_name');
 
 
$body = "You have received a donation. Details are as follows\n\n";
$body .= "First Name: " . $firstname . "\n";
$body .= "Last Name: " . $lastname . "\n";
$body .= "Full Name: " . $addressname . "\n";
$body .= "Street: " . $street . "\n";
$body .= "Town: " . $city . "\n";
$body .= "Email: " . $email . "\n";
$body .= "Currency: " . $currency . "\n";
$body .= "Amount: " . $amount . "\n";
$body .= "PayPal Fee: " . $fee . "\n";
$body .= "Item: " . $item . "\n";
$body .= $giftaid . "\n\n";
$body .= "This message sent by Donation Page.";
 
$mailer->setSubject('The Subject Line of Your Email');
$mailer->setBody($body);
 
// Here's the code that would allow you to add an attachment
//$mailer->addAttachment(JPATH_COMPONENT.DS.'assets'.DS.'document.pdf');
 
$send =& $mailer->Send();							// send the email
if ( $send !== true ) {
    //echo 'Error sending email: ' . $send->message;		// You probably won't want these messages seen
} else {
    //echo 'Mail sent';
}