I’m using code that gives the user a new role after three orders.
The default user role is “Customer” and I have created an additional role “Regular Customer”.
/* Create a new role */
add_action('init', 'luckydoll_add_custom_user_role');
function luckydoll_add_custom_user_role() {
add_role('regular_customer', __('Regular Customer', 'woocommerce'), array(
'read' => true,
'create_posts' => false,
));
}
/* Change user role after three orders */
function total_completed_orders( $the_user_id ) {
global $wpdb;
$count = $wpdb->get_var(
// phpcs:disable WordPress.DB.PreparedSQL.NotPrepared
"SELECT COUNT(*)
FROM $wpdb->posts as posts
LEFT JOIN {$wpdb->postmeta} AS meta ON posts.ID = meta.post_id
WHERE meta.meta_key = '_customer_user'
AND posts.post_type = 'shop_order'
AND posts.post_status = 'wc-completed'
AND meta_value = '" . esc_sql( $the_user_id ) . "'"
// phpcs:enable
);
return $count;
}
add_action( 'woocommerce_order_status_completed', 'action_woocommerce_order_status_completed', 10, 1 );
function action_woocommerce_order_status_completed( $order_id ) {
// User role in which the customer role must be changed
$premium_user_role = 'regular_customer';
// Spending min cash in one order
$min_in_one_order = 400;
// Change role after x completed orders
$change_role_after_x_completed_orders = 3;
$flag = false;
// Get an instance of the WC_Order object
$order = wc_get_order( $order_id );
// Is a order
if( is_a( $order, 'WC_Order' ) ) {
// Get user ID or $order->get_customer_id();
$user_id = $order->get_user_id();
// Retrieve user meta field for a user.
$is_premium = get_user_meta( $user_id, '_customer_is_premium_member', true );
// Is NOT a premium member
if ( $is_premium != 1 ) {
// Count total completed orders
$total_completed_orders = total_completed_orders( $user_id );
// Total completed orders greater than or equal to change role after x completed orders
if ( $total_completed_orders >= $change_role_after_x_completed_orders ) {
$flag = true;
} else {
// Get current order total
$order_total = $order->get_total();
// Order total greater than or equal to minimum in one order
if ( $order_total >= $min_in_one_order ) {
$flag = true;
}
}
// True, at least 1 condition has been met
if ( $flag ) {
// Get the user object
$user = get_userdata( $user_id );
// Get all the user roles as an array.
$user_roles = $user->roles;
// User role contains 'customer'
if ( in_array( 'customer', $user_roles ) ) {
// Remove customer role
$user->remove_role( 'customer' );
// Add premium role
$user->add_role( $premium_user_role );
// Update user meta field based on user ID, set true
update_user_meta( $user_id, '_customer_is_premium_member', 1 );
}
}
}
}
}
When a registered user places three orders, their role automatically changes.
But if a guest makes an order and the manager sets his order to the “Done” status, a critical error appears. 
line 347: $user_roles = $user->roles;
line 350: if ( in_array( 'customer', $user_roles ) ) {
I can disable guest checkout. On the other hand, I can’t force guests to register on the site if they don’t want to.
How can this error be fixed? Is it possible to exclude guests from this custom code?
