Gravity Forms "save_field_value"

I would like multiple fields to be changed after the form has been sent. I found this function on their support page:

<?php
add_filter("gform_save_field_value", "save_field_value", 10, 4);
function save_field_value($value, $lead, $field, $form){
        if(absint($form["id"]) <> 94)
                return $value;

        $encode_fields = array(1,2,3);

        if(in_array($field["id"],$encode_fields))
                return base64_encode($value);
        else
                return $value;
}
?>

Now assume that I want field ID 1, 2 and 3 to be changed to a value $value1, $value2, $value3 respectively. How do I do this? I tried the following but it didn’t work:

<?php
add_filter("gform_save_field_value", "save_field_value", 10, 4);
function save_field_value($value, $lead, $field, $form){
        if(absint($form["id"]) <> 94)
                return $value;

        $encode_fields = array(1,2,3);

        if(in_array($field["id"],$encode_fields))
                return array($value1, $value2, $value3);
        else
                return $value;
}
?>

Hope someone can help, thanks ??