Restrict access to Custom Post Type based on membership level.

my_pmpro_has_membership_access_filter_cpt.php

<?php
/**
 * Restrict access to CPT based on membership level.
 *
 * Ref: https://www.paidmembershipspro.com/hook/pmpro_has_membership_access_filter_post_type/
 *
 * 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/
 */
function my_pmpro_has_membership_access_filter_cpt( $hasaccess, $post, $user, $levels ) {
	// Level IDs of memberships required to access this CPT.
	$required_level_ids = array( 1, 2, 3 );

	if ( ! pmpro_hasMembershipLevel( $required_level_ids ) ) {
		$hasaccess = false;
	}
 
	return $hasaccess;
}
add_filter( 'pmpro_has_membership_access_filter_cpt', 'my_pmpro_has_membership_access_filter_cpt', 10, 4 );