# withAttribute

Learn how to add a context attribute to the evaluation.

This method adds a context attribute, identified by a name, to the evaluation.

## Signature

This method has the following signature:

```php
public function withAttribute(string $name, mixed $value): self
```

This method returns a copy of the options with the change applied, leaving the original unchanged.

## Example

Here is a basic example of how to use this method:

```php
<?php
use Croct\Plug\EvaluationOptions;

$options = EvaluationOptions::defaults()->withAttribute('plan', 'premium');
```

## Parameters

The following list describes the supported parameters:

- `name`: `string`

  The name that identifies the context attribute.

- `value`: `mixed`

  The value of the context attribute.