---
title: "Change the search parameter from “letter” to something else"
date: 2026-04-23
author: "GravityKit"
link: "https://www.gravitykit.com/docs/gravityview-pro/a-z-filters/change-the-search-parameter-from-letter-to-something-else/"
---

By default, the A-Z Entry Filter Extension uses the `letter` parameter to filter entries. For example, if you have a View at `yoursite.com/view/example/` and you wanted to filter by entries that start with a, you would go to `/view/example/?letter=a`

### How to modify the URL parameter used

 The Extension has a `gravityview_az_filter_parameter` filter that allows you to change the parameter.

 Instead of `letter`, you could use `starts_with` as the parameter, and the link would be `/view/example/?starts_with=a` instead of `/view/example/?letter=a`

 Here's a sample code that would do that:

```
add_filter( 'gravityview_az_filter_parameter', 'gravityview_az_filter_parameter_starts_with' );
/**
 * Change the A-Z Entry Filter parameter from `letter` to `starts_with`
 * @param  string $parameter Existing parameter
 * @return string            Modified parameter
 */
function gravityview_az_filter_parameter_starts_with( $parameter ) {
    return 'starts_with';
}
```

```
add_filter( 'gravityview_az_filter_parameter', 'gravityview_az_filter_parameter_starts_with' );
/**
 * Change the A-Z Entry Filter parameter from `letter` to `starts_with`
 * @param  string $parameter Existing parameter
 * @return string            Modified parameter
 */
function gravityview_az_filter_parameter_starts_with( $parameter ) {
    return 'starts_with';
}
```