Member Avatar for mangel.murti

hello all,

suppose i have an a site where i am selling a webform .how do i set it up so that when someone pays they immediately receive a downoad link either to their email box or get directed to a link

thnx in advance.........

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Dani AI

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Good direction from — have PayPal call your server — and thanks for the sandbox detail, . Practical, reliable flow and common pitfalls below.

Use IPN (Instant Payment Notification) as the authoritative delivery mechanism and optionally use PDT/auto-return for an immediate user redirect. IPN is server-to-server and still fires if the buyer closes the browser; PDT/auto-return only works if the buyer is sent back to your site. In the IPN listener verify the message with PayPal (send back the raw POST prefixed with cmd=_notify-validate) and confirm payment_status == "Completed", receiver_email, mc_gross/currency and that txn_id is not reused. After verification create a single-use token stored in your database (token, file id, expiry, allowed downloads) and either email the token link to payer_email or redirect the buyer to the download URL once PDT confirms the tx.

Quick examples (trimmed to show intent):

// after IPN verification
$token = bin2hex(random_bytes(16));
$expires = time() + 3600; // 1 hour
// insert token, file_id, expires, downloads_allowed into DB
header("Location: /download.php?token=$token");
exit;
// download.php (very simplified)
$token = $_GET['token'];
// lookup token, check expiry and remaining downloads, then:
header('Content-Type: application/zip');
header('Content-Disposition: attachment; filename="product.zip"');
readfile('/path/outside/webroot/product.zip');
// decrement or delete token

Sandbox testing tips and gotchas: use PayPal sandbox accounts (buyer + seller), set notify_url or enable IPN in the seller sandbox, use a public URL or tunnel (ngrok) so PayPal can reach your listener, and log raw IPN/PDT posts and verification responses. Don’t publish direct file URLs — always serve files from a script that checks the token, enforces expiry and download limits.

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Member Avatar for BzzBee

You must be giving a link to paypal to send their notification. At that file apply download code. As user will complete its payment process it will be redirected to that page and then a download file box will appear to save downloading file.

Member Avatar for mangel.murti

You must be giving a link to paypal to send their notification. At that file apply download code. As user will complete its payment process it will be redirected to that page and then a download file box will appear to save downloading file.

thanx for reply...

i created webform , where user can make his webform and after pay download it, in final step we are giving a zip file for download.Trasaction going successfull in sandbox testing envirnment...but struggling with providing or redirecting to download link in sandbox testing.....

we are not collecting any information of user , he has to pay and get that final zip file

is this possible ?

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