# ContentRangeUnit

> Defines supported units for HTTP Content-Range headers.

[API reference](/docs/api/index.md) › [PSR bridge](/docs/extensions/psr-bridge/reference/index.md) › [emitter](/docs/extensions/psr-bridge/reference/emitter/index.md) › ContentRangeUnit

| enum | `yii2\extensions\psrbridge\emitter\ContentRangeUnit` |
| --- | --- |
| Backed by | `string` |
| Source | [`src/emitter/ContentRangeUnit.php`](https://github.com/yii2-extensions/psr-bridge/blob/main/src/emitter/ContentRangeUnit.php#L12) |

Defines supported units for HTTP Content-Range headers.

See also: <https://datatracker.ietf.org/doc/html/rfc7233#section-4.2> (RFC 7233 section 4.2.).

## Cases

| Case | Value | Description |
| --- | --- | --- |
| <span id="case-BYTES"></span>`BYTES` | `'bytes'` | Bytes unit used in Content-Range headers. |