respect-validation/docs/validators/CountryCode.md
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<!--
SPDX-FileCopyrightText: (c) Respect Project Contributors
SPDX-License-Identifier: MIT
-->
# CountryCode
- `CountryCode()`
- `CountryCode("alpha-2"|"alpha-3"|"numeric" $set)`
Validates whether the input is a country code in [ISO 3166-1][] standard.
**This validator requires [sokil/php-isocodes][] and [sokil/php-isocodes-db-only][] to be installed.**
```php
v::countryCode()->assert('BR');
// Validation passes successfully
v::countryCode('alpha-2')->assert('NL');
// Validation passes successfully
v::countryCode('alpha-3')->assert('USA');
// Validation passes successfully
v::countryCode('numeric')->assert('504');
// Validation passes successfully
```
This validator supports the three sets of country codes:
- ISO 3166-1 alpha-2: `alpha-2`
- ISO 3166-1 alpha-3: `alpha-3`
- ISO 3166-1 numeric: `numeric`
When no set is defined, the validator uses `'alpha-2'` (`CountryCode::ALPHA2`).
## Templates
### `CountryCode::TEMPLATE_STANDARD`
| Mode | Template |
| ---------: | :------------------------------------------- |
| `default` | {{subject}} must be a valid country code |
| `inverted` | {{subject}} must not be a valid country code |
## Template placeholders
| Placeholder | Description |
| ----------- | ---------------------------------------------------------------- |
| `subject` | The validated input or the custom validator name (if specified). |
## Categorization
- ISO codes
- Localization
## Changelog
| Version | Description |
| ------: | :---------------------------------------------------------------- |
| 3.0.0 | Require [sokil/php-isocodes][] and [sokil/php-isocodes-db-only][] |
| 2.0.0 | Became case-sensitive |
| 0.5.0 | Created |
## See Also
- [CurrencyCode](CurrencyCode.md)
- [LanguageCode](LanguageCode.md)
- [PostalCode](PostalCode.md)
- [PublicDomainSuffix](PublicDomainSuffix.md)
- [SubdivisionCode](SubdivisionCode.md)
- [Tld](Tld.md)
[ISO 3166-1]: https://wikipedia.org/wiki/ISO_3166-1
[sokil/php-isocodes]: https://github.com/sokil/php-isocodes
[sokil/php-isocodes-db-only]: https://github.com/sokil/php-isocodes-db-only