Class Identity Management

1.1.0 2018-07-04 22:34 UTC

This package is auto-updated.

Last update: 2024-05-22 22:42:55 UTC


Quality Assurance

PHP 5.6 PHP 7 Build Status Test Coverage Maintainability

See the Test Contract


Provides a simple helper capability for class Identity management


This is one of those bits of code you write over and over. Many applications require the classes they use to have some form of Identity. Typically in data driven applications this will equate to the id primary key field. This library provides support for that.


If you want more, either suggest it, or better still, fork it and provide a pull request.

Check out ZF4 Packages for more packages


Coding Basics

The code is supplied as an interface and a trait. Simply declare your class as implementing the Identifiable interface and then use the Identifying trait in the class to supply the functionality.

Identities are based on Chippyash\Type\Interfaces\TypeInterface. This allows for strong typing and enforcement of identity rules. For instance, here is an example of a product id that is a fixed length digit string.

use Chippyash\Type\String\DigitType;

 * A unique identifier
class Identifier extends DigitType
     * Length of product id, it will be front padded with zeros to this length
     * or cut to this length
     * @var int
    protected $length = 10;

     * @return int
    public function getLength()
        return $this->length;

     * @param mixed $value
     * @return string
    protected function typeOf($value)
        $v = parent::typeOf($value);
        if (strlen($v) > $this->length) {
            return substr($v, -$this->length);

        return str_pad($v, $this->length, '0',STR_PAD_LEFT);

Your class can then simpy use it thus:

use Chippyash\Identity\Identifiable;
use Chippyash\Identity\Identifying;

class Product implements Identifiable
	use Identifying;
	public function __construct(Identifier $id)
		$this->id = $id;
		//or maybe there is some other way of establishing the identity

$product = new Product(new Identifier(53));
$id = $product->id(); // returns Identifier
$vId = $product->vId(); //returns '0000000053'
$vId = $product->id()->get(); //returns '0000000053'

Changing the library

  1. fork it
  2. write the test
  3. amend it
  4. do a pull request

Found a bug you can't figure out?

  1. fork it
  2. write the test
  3. do a pull request

NB. Make sure you rebase to HEAD before your pull request

Or - raise an issue ticket.


The library is hosted at Github. It is available at


Install Composer

For production

    "chippyash/identity": ">=1,<2"

For development

Clone this repo, and then run Composer in local repo root to pull in dependencies

    git clone
    cd identity
    composer update

To run the tests:

    cd identity
    vendor/bin/phpunit -c test/phpunit.xml test/


This software library is released under the BSD 3 Clause license

This software library is Copyright (c) 2015, Ashley Kitson, UK


V1.0.0 Original release

V1.0.1 Updates for build running

V1.0.2 Documentation update

V1.0.3 composer.json fix

V1.0.4 dependency update

V1.1.0 Change of license from GPL V3 to BSD 3 Clause