You’re a Tenant, Not the Owner: 6 Doors in Someone Else’s wp-admin, and How Not to Be a Bad Neighbor
Rules of a Good Neighbor — One Per Hook `admin_init` — move in quietly Don’t run heavy code or checks without a reason — this hook fires on…

Filter Hook since 2.8.0
Filters the text shown in the bottom-left of every admin page
admin_footer_text is a lightweight branding hook — agencies commonly use it to replace WordPress's default footer credit with their own support link.
On every wp-admin page, when the admin footer renders.
apply_filters( 'admin_footer_text', string $text );$text string — Admin footer text.add_filter( 'admin_footer_text', function() {
return 'Managed by Acme Agency — <a href="https://example.com/support">Get support</a>';
} );Replace the default footer credit with an agency support link.
Rules of a Good Neighbor — One Per Hook `admin_init` — move in quietly Don’t run heavy code or checks without a reason — this hook fires on…
Return an empty string from the filter — WordPress will render the footer area with no text.
Source: wp-admin/includes/template.php
One session: this hook, then each related_hooks entry. Walk it and tell us what to change.
admin_footer_text → admin_notices
Practice the admin_footer_text WordPress filter hook in our interactive sandbox — a VS Code-style editor with a step-by-step admin_footer_text tutorial, add_filter exercises, and instant feedback. No local WordPress install required.