The following code can be used to remove the text from the dashboard:
function cwhf_remove_wp_footer_admin()
{
add_filter( 'admin_footer_text', '__return_false', 11 );
}
add_action( 'admin_init', 'cwhf_remove_wp_footer_admin' );
Instead of an empty text, you can also set your own text here.
Remove WordPress version from the bottom of the dashboard
The version can be removed in this way:
function cwhf_remove_version_wp_footer_admin()
{
add_filter( 'update_footer', '__return_false', 11 );
}
add_action( 'admin_init', 'cwhf_remove_version_wp_footer_admin' );
To hide both, you should ideally combine both filter calls:
function cwhf_remove_wp_footer_admin()
{
add_filter( 'admin_footer_text', '__return_false', 11 );
add_filter( 'update_footer', '__return_false', 11 );
}
add_action( 'admin_init', 'cwhf_remove_wp_footer_admin' );