So I've been using this script: http://www.codexworld.com/paypal-standard-payment-gateway-integration-php/ and I got this to work properly. The thing is - after payment, this transfers to the site:
http://www.leagueaccountsbot.xaa.pl/paypal_test/success.php?amt=15.00&cc=USD&item_name=League%20Accounts%20Bot&item_number=1&st=Completed&tx=7VT27047DB709492G
And it's enough if you change, for example, the "item_name=XXX" in link - and it will get inserted into the database. Is there anything I can do about it? Shouldn't it be done in IPN.php and just completely removed in success.php?
Send request via Curl and save response in server end.