Language

Validates that a value is a valid language Unicode language identifier (e.g. fr or zh-Hant).

Applies to property or method
Options
Class Language
Validator LanguageValidator

Basic Usage

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    // src/Entity/User.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class User
{
    /**
     * @Assert\Language
     */
    protected $preferredLanguage;
}
  • YAML
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    # config/validator/validation.yaml
App\Entity\User:
    properties:
        preferredLanguage:
            - Language: ~
  • XML
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    <!-- config/validator/validation.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">

    <class name="App\Entity\User">
        <property name="preferredLanguage">
            <constraint name="Language"/>
        </property>
    </class>
</constraint-mapping>
  • PHP
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    // src/Entity/User.php
namespace App\Entity;

use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Mapping\ClassMetadata;

class User
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('preferredLanguage', new Assert\Language());
    }
}

Note

As with most of the other constraints, null and empty strings are considered valid values. This is to allow them to be optional values. If the value is mandatory, a common solution is to combine this constraint with NotBlank.

Options

alpha3

New in version 5.1: The alpha3 option was introduced in Symfony 5.1.

type: boolean default: false

If this option is true, the constraint checks that the value is a ISO 639-2 three-letter code (e.g. French = fra) instead of the default ISO 639-1 two-letter code (e.g. French = fr).

groups

type: array | string

It defines the validation group or groups this constraint belongs to. Read more about validation groups.

message

type: string default: This value is not a valid language.

This message is shown if the string is not a valid language code.

You can use the following parameters in this message:

Parameter Description
{{ value }} The current (invalid) value

payload

type: mixed default: null

This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to you.

For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.