Copyright info change – Corporate Plus Theme PHP [closed]

Both functions check if the function corporate_plus_footer() exists. If not, one is defined. Without going deeper into hooks and filters, you can simply declare your own corporate_plus_footer() and the other won’t get loaded.

Add this to your functions.php

function corporate_plus_footer() {
    echo 'it works';
}

No additional add_action() or similar. Just this function in your functions.php should already work.