# UnprocessableEntityHttpException

> UnprocessableEntityHttpException represents an "Unprocessable Entity" HTTP exception with status code 422.

[API reference](/docs/api/index.md) › [yii](/docs/api/yii/index.md) › [web](/docs/api/yii/web/index.md) › UnprocessableEntityHttpException

| class | `yii\web\UnprocessableEntityHttpException` |
| --- | --- |
| Extends | [`HttpException`](/docs/api/yii/web/httpexception/index.md) » [`yii\base\UserException`](/docs/api/yii/base/userexception/index.md) » [`yii\base\Exception`](/docs/api/yii/base/exception/index.md) » [`Exception`](https://www.php.net/manual/en/class.exception.php) |
| Since | 2.0.7 |
| Source | [`framework/web/UnprocessableEntityHttpException.php`](https://github.com/yiisoft/yii2/blob/22.0/framework/web/UnprocessableEntityHttpException.php#L24) |

UnprocessableEntityHttpException represents an "Unprocessable Entity" HTTP
exception with status code 422.

Use this exception to inform that the server understands the content type of
the request entity and the syntax of that request entity is correct but the server
was unable to process the contained instructions. For example, to return form
validation errors.

## Properties

| Property | Type | Description | Defined by |
| --- | --- | --- | --- |
| <span id="property-statusCode"></span>[`$statusCode`](/docs/api/yii/web/httpexception/index.md#property-statusCode) | `int` | HTTP status code, such as 403, 404, 500, etc. Default: `null`. | [`HttpException`](/docs/api/yii/web/httpexception/index.md) |

## Methods

| Method | Description | Defined by |
| --- | --- | --- |
| [`__construct()`](#method-__construct) | Constructor. | `UnprocessableEntityHttpException` |
| <span id="method-getName"></span>[`getName()`](/docs/api/yii/web/httpexception/index.md#method-getName) |  | [`HttpException`](/docs/api/yii/web/httpexception/index.md) |

## Method details

### __construct() <span id="method-__construct"></span>

```php
public function __construct(string|null $message = null, int $code = 0, Throwable|null $previous = null)
```

Constructor.

**Parameters**

| Parameter | Type | Description |
| --- | --- | --- |
| `$message` | `string\|null` | Error message |
| `$code` | `int` | Error code |
| `$previous` | [`Throwable`](https://www.php.net/manual/en/class.throwable.php)`\|null` | The previous exception used for the exception chaining. |