Restrict membership access based on parent category

pmpro-restrict-posts-based-on-parent-category.php

/*
Restrict membership access based on parent category

*/
function category_restrictions($hasaccess, $mypost, $myuser, $post_membership_levels)
{
	global $post, $current_user;
	$categories = wp_get_post_categories($mypost->ID);
	
	$restrict = false;
	
	$level = pmpro_getMembershipLevelForUser($myuser->ID);
	
	if(!empty($level))
		$level_id = $level->id;
	else
		$level_id = 0;
	
	foreach($categories as $category)
	{
		$parent_category = get_category($category)->parent;
		$restricted_cats = pmpro_getMembershipCategories($level_id);
		
		if(!empty($parent_category) && !in_array($parent_category, $restricted_cats))
			return false;
	}
	
	return $hasaccess;
}
add_filter('pmpro_has_membership_access_filter', 'category_restrictions', 10, 4);