Extra data to order summary paypal via gform_paypal_query hook

Anyone know if is there possible to add extra data to order summary of paypal?

Order Summary http://imageshack.us/a/img32/9984/paywithapaypalaccountpa.png

I tried to send transaction_subject variable through gform_paypal_query but does not work.

add_filter('gform_paypal_query', 'update_paypal_query', 10, 3);

function update_paypal_query($query_string, $form, $entry){

	//put PayPal querystring into an array
    parse_str($query_string, $query);

    $query['transaction_subject'] = "$entry[12] cotas reembolsáveis para o evento $entry[13]";

    $query_string = http_build_query($query, '', '&');

    return '&' . $query_string;
}

References:

https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_admin_IPNIntro

https://cms.paypal.com/cms_content/US/en_US/files/developer/PP_WebsitePaymentsStandard_IntegrationGuide.pdf

Any thoughts will be apreciated, thanks all!

Hi Chris, thanks for your fast reply :)

Also thanks for the tip about urlencode() function.

I realized that the variable item_namex that holds the main description of transaction, in this case Preço por cota as we can see in attached image above and within IPN message &item_name1=Preço por cota.

Now I'm trying to understand how GF PayPal Add-on handle this variable in gravityformspaypal/paypal.php.

Also I could not echo the $query_string before it's returned from my function because the gform_paypal_query hook is fired immediately before the user is redirected to PayPal. So I'll try to print the $query_string in a text file.

I changed my code but have not had success.

add_filter('gform_paypal_query', 'update_paypal_query', 10, 3);

function update_paypal_query($query_string, $form, $entry) {

	//put PayPal querystring into an array
    parse_str($query_string, $query);

    $descricao = "$entry[12] cotas reembolsáveis para o evento $entry[13]";

    $query['item_name1'] = urlencode($descricao);

    $query_string = http_build_query($query, '', '&');

    print_r($query_string);

    return '&' . $query_string;
}

When I have some progress I post here.

Cheers

Dah! I just typed wrong the variable name. Instead of item_name1 is item_name_1.

Now the code look like this:

add_filter('gform_paypal_query', 'update_paypal_query', 10, 3);

function update_paypal_query($query_string, $form, $entry) {
parse_str($query_string, $query);
$query['item_name_1'] = get_the_title($entry[13]);
$query_string = http_build_query($query, '', '&');
return '&' . $query_string;
}

Now I run into another issue, the charset doesn't match. The special characters are displaying messed up in description of order summary.

I added the title of post to query string variable item_name_1 (line 5), but when the title has special characters (like à á â ã) so this are not displaying correctly in description of order summary.

I already tried the functions: utf8_encode(), esc_attr(strip_tags()), iconv() and urlencode() but have not had success yet. In fact the urlencode() was not necessary.

I've also checked the default character encoding settings in PayPal, was Windows-1252 and I changed to UTF-8.

Anyone has any thoughts?