Email notification after file upload (customizing php)

I’m not entirely sure if this is possible but I have this php code that sends an email to me

<?php
date_default_timezone_set('UTC');
// sending email via PHP's Mail()
$to      = '[email protected]';
$subject = $user_login . " has uploaded a new file(s)";
$message = "New files have been uploaded etc..";
$headers = 'From: [email protected]' . "\r\n" .
'Reply-To: [email protected]' . "\r\n" .
'X-Mailer: PHP/' . phpversion();
mail($to, $subject, $message, $headers);
?>

Basically i want it to notify me when someone has uploaded a file. (i already have fileup set up in a page)

Which php file would i put this in if i want it to send me an email right after the user has uploaded files using fileup. Thanks for any help.

https://ww.wp.xz.cn/plugins/file-away/