Attach files with Gravity Forms Notification Emails - Gravity Forms

functions.php

<?php
//* Attaching file to the form notification user email
//* in gform_notification_7, the number 7 is the FORM ID
//* This snippet works with the newer version of Gravity Forms too
add_filter('gform_notification_7', 'add_attachment_pdf', 10, 3); //target form id 7, change to your form id
function add_attachment_pdf( $notification, $form, $entry ) {
    //There is no concept of user notifications anymore, so we will need to target notifications based on other criteria,
    //such as name or subject
    if($notification["name"] == "User Notification - Life Lesson"){
		//get upload root for WordPress
		$upload = wp_upload_dir();
		$upload_path = $upload["basedir"];

		//add file, use full path , example -- $attachment = "C:\\xampp\\htdocs\\wpdev\\wp-content\\uploads\\test.txt"
		$attachment = $upload_path . "/2016/08/some-file-name.pdf";
        $notification["attachments"] = $attachment;
    }
	//return altered notification object
    return $notification;
}

how to give dynamic values as file names as different user need to get different files

Thanks for sharing this, @isaumya. This is still working as of September 29, 2023.

Since site admins can change things like the notification name and subject, I'd recommend targeting the specific notification ID:

if( $notification['id'] === '7915ec2kj23d3' ) {
    // …attach the file…
}

For referenced, here's the current Gravity Forms documentations on this method.