Make the checkbox meta field checked by default

Actually, your code is working, as long as $val == 'on'.

Did you try debugging by doing echo $val ?

If it’s still not working, try hard refreshing (Ctrl + F5) your webpage, checkboxes tend to keep their state on normal refresh (F5).

Also, please put your code directly on this forum, so the code is always accessible for future viewers 😉

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