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Do you want to put a link or a message on the WP admin’s footer, well this snippet it will help you.
/** * * Customize admin footer text */ if ( ! function_exists( 'ns_custom_admin_footer' ) ) { function ns_custom_admin_footer() { echo 'add your custom footer text and html here'; } add_filter( 'admin_footer_text', 'ns_custom_admin_footer' ); }
source: 10 Tips optimize WordPress theme