Change required setting based on taxonomy field

Hello,

Thanks for the feedback! You could probably achieve that using the native filter acf/validate_value. See documentation.

Usage example:

add_filter('acf/validate_value/name=my_text', 'my_text_field_validate', 10, 4);
function my_text_field_validate($valid, $value, $field, $input_name){
    
    // retrieve $_POST['acf']
    $acf = acf_maybe_get_POST('acf', array());
    
    // get taxonomy field using key and force it to array
    $taxonomy = acf_maybe_get($acf, 'field_6100f527ff385');
    $taxonomy = acf_get_array($taxonomy);
    
    // if current value is empty and the Term ID 7 is in the taxonomy field
    if(empty($value) && in_array(7, $taxonomy)){
        
        // return an error
        $valid = 'This field is required';
        
    }
    
    // return
    return $valid;
    
}

Video demo: https://i.imgur.com/JI7aWAx.mp4

Hope it helps!

Have a nice day!

Regards.