With regards to Steve’s code, I can’t comment on that. He may have typed it in that way or perhaps WordPress is playing silly buggers. Either way, my code is correct and has the right characters.

Thanks.

FYI – When I copied over this code I noticed that Steve’s code has a single double quote character (”) following the ‘?’ rather than (the correct) 2 single quotes (”).

Thanks for your comments. I’ve updated the code to fix those two slight issues.

I’m glad this is helping someone, frankly example code is one of the most important parts of the documentation for services like this and PayPal’s is shoddy.

Mike

Thanks for the comment. Silly mistake on my half. Also, note that $notify_email is used by mistake in places instead of $CONFIG['notify_email'].

Thanks

Try this instead:
$item_name = (empty($_POST['item_name']) ? ” : $_POST['item_name']);
$business = (empty($_POST['business']) ? ” : $_POST['business']);
$item_number = (empty($_POST['item_number']) ? ” : $_POST['item_number']);
$payment_status = (empty($_POST['payment_status']) ? ” : $_POST['payment_status']);
$mc_gross = (empty($_POST['mc_gross']) ? ” : $_POST['mc_gross']);
$payment_currency = (empty($_POST['mc_currency']) ? ” : $_POST['mc_currency']);
$txn_id = (empty($_POST['txn_id']) ? ” : $_POST['txn_id']);
$receiver_email = (empty($_POST['receiver_email']) ? ” : $_POST['receiver_email']);
$receiver_id = (empty($_POST['receiver_id']) ? ” : $_POST['receiver_id']);
$quantity = (empty($_POST['quantity']) ? ” : $_POST['quantity']);
$num_cart_items = (empty($_POST['num_cart_items']) ? ” : $_POST['num_cart_items']);
$payment_date = (empty($_POST['payment_date']) ? ” : $_POST['payment_date']);
$first_name = (empty($_POST['first_name']) ? ” : $_POST['first_name']);
$last_name = (empty($_POST['last_name']) ? ” : $_POST['last_name']);
$payment_type = (empty($_POST['payment_type']) ? ” : $_POST['payment_type']);
$payment_status = (empty($_POST['payment_status']) ? ” : $_POST['payment_status']);
$payment_gross = (empty($_POST['payment_gross']) ? ” : $_POST['payment_gross']);
$payment_fee = (empty($_POST['payment_fee']) ? ” : $_POST['payment_fee']);
$settle_amount = (empty($_POST['settle_amount']) ? ” : $_POST['settle_amount']);
$memo = (empty($_POST['memo']) ? ” : $_POST['memo']);
$payer_email = (empty($_POST['payer_email']) ? ” : $_POST['payer_email']);
$txn_type = (empty($_POST['txn_type']) ? ” : $_POST['txn_type']);
$payer_status = (empty($_POST['payer_status']) ? ” : $_POST['payer_status']);
$address_street = (empty($_POST['address_street']) ? ” : $_POST['address_street']);
$address_city = (empty($_POST['address_city']) ? ” : $_POST['address_city']);
$address_state = (empty($_POST['address_state']) ? ” : $_POST['address_state']);
$address_zip = (empty($_POST['address_zip']) ? ” : $_POST['address_zip']);
$address_country = (empty($_POST['address_country']) ? ” : $_POST['address_country']);
$address_status = (empty($_POST['address_status']) ? ” : $_POST['address_status']);
$item_number = (empty($_POST['item_number']) ? ” : $_POST['item_number']);
$tax = (empty($_POST['tax']) ? ” : $_POST['tax']);
$option_name1 = (empty($_POST['option_name1']) ? ” : $_POST['option_name1']);
$option_selection1 = (empty($_POST['option_selection1']) ? ” : $_POST['option_selection1']);
$option_name2 = (empty($_POST['option_name2']) ? ” : $_POST['option_name2']);
$option_selection2 = (empty($_POST['option_selection2']) ? ” : $_POST['option_selection2']);
$for_auction = (empty($_POST['for_auction']) ? ” : $_POST['for_auction']);
$invoice = (empty($_POST['invoice']) ? ” : $_POST['invoice']);
$custom = (empty($_POST['custom']) ? ” : $_POST['custom']);
$notify_version = (empty($_POST['notify_version']) ? ” : $_POST['notify_version']);
$verify_sign = (empty($_POST['verify_sign']) ? ” : $_POST['verify_sign']);
$payer_business_name = (empty($_POST['payer_business_name']) ? ” : $_POST['payer_business_name']);
$payer_id = (empty($_POST['payer_id']) ? ” : $_POST['payer_id']);
$mc_currency = (empty($_POST['mc_currency']) ? ” : $_POST['mc_currency']);
$mc_fee = (empty($_POST['mc_fee']) ? ” : $_POST['mc_fee']);
$exchange_rate = (empty($_POST['exchange_rate']) ? ” : $_POST['exchange_rate']);
$settle_currency = (empty($_POST['settle_currency']) ? ” : $_POST['settle_currency']);
$parent_txn_id = (empty($_POST['parent_txn_id']) ? ” : $_POST['parent_txn_id']);
$pending_reason = (empty($_POST['pending_reason']) ? ” : $_POST['pending_reason']);
$reason_code = (empty($_POST['reason_code']) ? ” : $_POST['reason_code']);