PMPro - Allow Access to Specific Feeds

pmpro-allow-access-feeds.php

<?php
/**
 * Allow PMPro access to a specific feed.
 * Ref: https://gist.github.com/ocean90/4973288
 * 
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
/**
 * Check if in a specific feed and allow access.
 */
function my_pmpro_has_feed_access( $hasaccess, $mypost, $myuser, $post_membership_levels ) {
	$custom_feed = 'custom';
	if ( is_feed( $custom_feed ) ) {
		return true;
	}
	return $hasaccess;
}
add_filter( 'pmpro_has_membership_access_filter', 'my_pmpro_has_feed_access', 10, 4 );