---
id: gk-gravityboard-card-comparison-value
title: "Filter - gk/gravityboard/card/comparison-value"
sidebar_label: "gk/gravityboard/card/comparison-value"
---

# Filter: gk/gravityboard/card/comparison-value

Filter the form of a field value used to decide whether a card save changed it.

Return a key that is equal for two values meaning the same thing, so a save that only reformats a value is not reported, notified or written as a change.

## Parameters

| Name | Type | Description |
|------|------|-------------|
| $value | `mixed` | The stored or submitted value. |
| $field | `\GF_Field\|false` | The Gravity Forms field, or false when the form no longer has it. |
| $feed | `\FeedRow` | The feed data. |

### Since

- $ver$: $ver$

### Source

Defined in `src/Card.php` at line 1042