<?php
/*
Plugin Name: PDF After Submission
Description: Opens a PDF in a new tab after a Gravity Form is submitted for the resource custom post type.
Version: 1.0
Author: Your Name
*/

// Hook to Gravity Form submission for form ID 25
add_action('gform_after_submission_25', 'redirect_after_submission', 10, 2);

function redirect_after_submission($entry, $form) {
    // Get the PDF URL from ACF field
    $pdf_url = get_field('resource_target', $entry['post_id']);

    // If PDF URL is valid
    if (!empty($pdf_url) && filter_var($pdf_url, FILTER_VALIDATE_URL) !== false) {
        // Define the custom thank you page URL
        $thank_you_url = home_url('/thank-you/');
        $redirect_url = add_query_arg('pdf_url', urlencode($pdf_url), $thank_you_url);
        wp_redirect($redirect_url);
        exit;
    }
}