Ensure PMPro profile page URLs update when a Username is edited

functions.php

<?php
/**
 * Sync user_nicename with user_login so PMPro profile URLs
 * always reflect updated usernames.
 */
function pmpromd_sync_nicename_on_profile_update($user_id) {
    $user = get_userdata($user_id);
    if ($user) {
        $expected = sanitize_title($user->user_login);
        if ($user->user_nicename !== $expected) {
            wp_update_user(array(
                'ID'            => $user_id,
                'user_nicename' => $expected,
            ));
        }
    }
}
add_action('profile_update', 'pmpromd_sync_nicename_on_profile_update');

PMPro: Keep user_nicename in sync with user_login

Context

Paid Memberships Pro Member Directory & Profile Add On uses the user_nicename field to generate member profile URLs, e.g.:

https://example.com/profile/{user_nicename}/

By default in WordPress, user_login (username) cannot be changed once set.
However, plugins like Easy Username Updater allow admins to change usernames.
When that happens, WordPress updates user_login but does not update user_nicename.
As a result, PMPro profile URLs remain tied to the old username slug.

Solution

This snippet ensures that whenever a user profile is updated (such as with the Easy Username Updater plugin), the user_nicename is automatically synced to match the current user_login. This keeps PMPro profile URLs correct and up to date without requiring manual intervention.

Usage

• Add this snippet to your theme’s functions.php (or a site-specific plugin).
• From then on, any time a username is updated, the profile URL will update too.

Notes

• No need to flush permalinks; WordPress rewrite rules are unaffected.
• This does not retroactively fix past users unless their profiles are updated.