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# DataValues
DataValues is a small PHP library that aims to be a common foundation for representing "simple"
values. Values such as numbers, geographical coordinates, strings and times.
It is part of the [DataValues set of libraries](https://github.com/DataValues).
[](http://travis-ci.org/DataValues/DataValues)
[](https://scrutinizer-ci.com/g/DataValues/DataValues/)
[](https://scrutinizer-ci.com/g/DataValues/DataValues/)
On [Packagist](https://packagist.org/packages/data-values/data-values):
[](https://packagist.org/packages/data-values/data-values)
[](https://packagist.org/packages/data-values/data-values)
## Requirements
* PHP 5.3 or later
## Installation
You can use [Composer](http://getcomposer.org/) to download and install
this package as well as its dependencies. Alternatively you can simply clone
the git repository and take care of loading yourself.
### Composer
To add this package as a local, per-project dependency to your project, simply add a
dependency on `data-values/data-values` to your project's `composer.json` file.
Here is a minimal example of a `composer.json` file that just defines a dependency on
DataValues 1.0:
{
"require": {
"data-values/data-values": "1.0.*"
}
}
### Manual
Get the DataValues code, either via git, or some other means. Also get all dependencies.
You can find a list of the dependencies in the "require" section of the composer.json file.
Load all dependencies and the load the DataValues library by including its entry point:
DataValues.php.
## Tests
This library comes with a set up PHPUnit tests that cover all non-trivial code. You can run these
tests using the PHPUnit configuration file found in the root directory. The tests can also be run
via TravisCI, as a TravisCI configuration file is also provided in the root directory.
## Authors
DataValues has been written primarily by [Jeroen De Dauw](https://www.mediawiki.org/wiki/User:Jeroen_De_Dauw),
in part as [Wikimedia Germany](https://wikimedia.de) employee for the [Wikidata project](https://wikidata.org/).
Contributions where also made by [several other awesome people]
(https://www.ohloh.net/p/datavalues/contributors).
## Release notes
### 1.0 (2014-09-26)
* The CI now ensures compatibility with PHP 5.6 and HHVM
* A lot of type hints where improved
* Protected methods and fields where changed to private
* The test bootstrap no longer executes `composer update`
* The test bootstrap now sets PHP strict mode
* The contract of the `Hashable::getHash` method was updated
* The MediaWiki internationalization support has been migrated to the JSON based version
### 0.1.1 (2013-11-22)
* Removed support for running the tests via the MediaWiki test runner.
* The test bootstrapping file now automatically does a composer install.
* Removed custom autoloader in favour of defining autoloading in composer.json.
### 0.1 (2013-11-16)
Initial release with these features:
* DataValue interface
* BooleanValue implementation
* NumberValue implementation
* StringValue implementation
* UnDeserializableValue implementation
* UnknownValue implementation
* Common interface definitions: Comparable, Copyable, Hashable, Immutable
## Links
* [DataValues on Packagist](https://packagist.org/packages/data-values/data-values)
* [DataValues on Ohloh](https://www.ohloh.net/p/datavalues)