data-validator is a PHP lib providing you with a structure to validate your data using Symfony's validator.

data-validator uses composer.

To include it, either use composer require

composer require johnpancoast/data-validator:~0.4.0

... or require it in your project's composer file

{
    "require": {
        "johnpancoast/data-validator": "~0.4.0",
    }
}

Docs to come