# HeadersAlreadySentException

> Thrown when code attempts to emit headers after headers are already sent.

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

| final class | `yii2\extensions\psrbridge\exception\HeadersAlreadySentException` |
| --- | --- |
| Extends | [`yii\base\Exception`](/docs/api/yii/base/exception/index.md) » [`Exception`](https://www.php.net/manual/en/class.exception.php) |
| Source | [`src/exception/HeadersAlreadySentException.php`](https://github.com/yii2-extensions/psr-bridge/blob/main/src/exception/HeadersAlreadySentException.php#L12) |

Thrown when code attempts to emit headers after headers are already sent.

## Methods

| Method | Description | Defined by |
| --- | --- | --- |
| <span id="method-getName"></span>[`getName()`](/docs/api/yii/base/exception/index.md#method-getName) |  | [`yii\base\Exception`](/docs/api/yii/base/exception/index.md) |