Trying to run code in a plugin only if a checkbox is ticked

Hi Sridhar,

You are right, before clicking the button Save Settings, the fields' value is not saved to the database so the helper function rwmb_meta() always returns a null value.

If you want to set the field kn_checkbox_kadence checked as default, please try to use this code:

add_action( 'admin_init', function() {
    if( get_option( 'kadence_navigator' ) !== null ) {
        $options = array( 
            'kn_checkbox_kadence' => 1
        );
        update_option( 'kadence_navigator', $options );
    }
} );