PHPackages                             jardissupport/classversion - PHPackages - PHPackages  [Skip to content](#main-content)[PHPackages](/)[Directory](/)[Categories](/categories)[Trending](/trending)[Leaderboard](/leaderboard)[Changelog](/changelog)[Analyze](/analyze)[Collections](/collections)[Log in](/login)[Sign up](/register)

1. [Directory](/)
2. /
3. [Utility & Helpers](/categories/utility)
4. /
5. jardissupport/classversion

ActiveLibrary[Utility & Helpers](/categories/utility)

jardissupport/classversion
==========================

Runtime class versioning via namespace injection with configurable fallback chains and proxy caching

v1.0.0(2mo ago)0591PolyForm-Noncommercial-1.0.0PHPPHP >=8.2CI passing

Since Mar 18Pushed 2mo agoCompare

[ Source](https://github.com/jardisSupport/classversion)[ Packagist](https://packagist.org/packages/jardissupport/classversion)[ Docs](https://github.com/jardissupport/classversion)[ RSS](/packages/jardissupport-classversion/feed)WikiDiscussions main Synced 1mo ago

READMEChangelog (1)Dependencies (4)Versions (5)Used By (1)

Jardis ClassVersion
===================

[](#jardis-classversion)

[![Build Status](https://github.com/jardisSupport/classversion/actions/workflows/ci.yml/badge.svg)](https://github.com/jardisSupport/classversion/actions/workflows/ci.yml/badge.svg)[![License: PolyForm Shield](https://camo.githubusercontent.com/d8fb46c82be4c5312bf3e372ac734dfdf6a8b328e9c2b2856af671adbb0600a5/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f4c6963656e73652d506f6c79466f726d253230536869656c642d626c75652e737667)](LICENSE.md)[![PHP Version](https://camo.githubusercontent.com/a68b290dcc313d698dc138a1111aa83eee2f143605449d7e8b5416ea6f88558f/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048502d253345253344382e322d3737374242342e737667)](https://www.php.net/)[![PHPStan Level](https://camo.githubusercontent.com/c51bda247654363d3e30bc352674dd761a9557803a14af0226eb411d6dc0006b/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5048505374616e2d4c6576656c253230382d627269676874677265656e2e737667)](phpstan.neon)[![PSR-12](https://camo.githubusercontent.com/34b10db0caa29bacd49bda5c437a8de95385f036f3230b31fa605326e18da22c/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f436f64652532305374796c652d5053522d2d31322d626c75652e737667)](phpcs.xml)[![Coverage](https://camo.githubusercontent.com/18f6a2df42ae1afe8a625856c82e58467ea6af9260d0dfafd9c90ed2cab3d400/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f436f7665726167652d39362e36392532352d627269676874677265656e2e737667)](https://github.com/jardisSupport/classversion)

> Part of the **[Jardis Business Platform](https://jardis.io)** — Enterprise-grade PHP components for Domain-Driven Design

Runtime class versioning via namespace injection. Load different implementations of the same class by version label — without changing call sites. Configure fallback chains so a missing version silently degrades to the previous one. Register proxy instances for hot-swapping at test or runtime. Deploy new logic versions without breaking existing code.

---

Features
--------

[](#features)

- **SubDirectory Resolution** — injects a version label into the namespace to locate versioned class implementations
- **Proxy Cache** — pre-register object instances via `LoadClassFromProxy` that are returned directly, bypassing class loading
- **Fallback Chains** — define ordered fallback sequences in `ClassVersionConfig` so resolution degrades gracefully across versions
- **Version Groups + Aliases** — map multiple labels to one canonical version key
- **Tracing Decorator** — wrap any resolver in `TracingClassVersion` to record every resolution for debugging
- **Zero-coupling** — works with any PSR-4 autoloader, no framework dependency required

---

Installation
------------

[](#installation)

```
composer require jardissupport/classversion
```

Quick Start
-----------

[](#quick-start)

```
use JardisSupport\ClassVersion\Data\ClassVersionConfig;
use JardisSupport\ClassVersion\Reader\LoadClassFromSubDirectory;
use JardisSupport\ClassVersion\ClassVersion;

// Map version labels to canonical subdirectory names
$config = new ClassVersionConfig(
    version: ['V2' => ['v2', '2.0'], 'V1' => ['v1', '1.0']],
);

$resolver = new ClassVersion(
    $config,
    new LoadClassFromSubDirectory($config),
);

// Resolves App\Service\V2\Calculator (namespace injection)
$className = $resolver(App\Service\Calculator::class, 'v2');

$instance = new $className();
```

Advanced Usage
--------------

[](#advanced-usage)

```
use JardisSupport\ClassVersion\Data\ClassVersionConfig;
use JardisSupport\ClassVersion\Reader\LoadClassFromSubDirectory;
use JardisSupport\ClassVersion\Reader\LoadClassFromProxy;
use JardisSupport\ClassVersion\ClassVersion;
use JardisSupport\ClassVersion\TracingClassVersion;

// Fallback chain: if V2 namespace is missing, try V1 before the base class
$config = new ClassVersionConfig(
    version: ['V2' => ['v2', '2.0'], 'V1' => ['v1', '1.0']],
    fallbacks: ['V2' => ['V1']],
);

// Proxy cache: return a pre-built instance for a specific class + version
$proxy = new LoadClassFromProxy($config);
$proxy->addProxy(App\Service\Calculator::class, new MyTestCalculator(), 'v2');

$resolver = new ClassVersion(
    $config,
    new LoadClassFromSubDirectory($config),
    $proxy,
);

// Wrap with tracing decorator to record all resolutions
$tracing = new TracingClassVersion($resolver);

// Returns the pre-registered proxy instance directly
$result = $tracing(App\Service\Calculator::class, 'v2');

// Resolves App\Service\V2\Formatter — falls back to V1 if the V2 namespace is absent
$className = $tracing(App\Service\Formatter::class, 'v2');
$instance = new $className();

// Inspect the resolution log
foreach ($tracing->getTrace() as $entry) {
    echo $entry['requested'] . ' [' . ($entry['version'] ?? 'default') . ']'
        . ' → ' . $entry['type'] . PHP_EOL;
}

$tracing->clearTrace();
```

Documentation
-------------

[](#documentation)

Full documentation, guides, and API reference:

**[jardis.io/docs/support/classversion](https://jardis.io/docs/support/classversion)**

License
-------

[](#license)

This package is licensed under the [PolyForm Shield License 1.0.0](LICENSE.md). Free for all use except building competing frameworks or developer tooling.

---

**[Jardis](https://jardis.io)** · [Documentation](https://jardis.io/docs) · [Headgent](https://headgent.com)

###  Health Score

42

—

FairBetter than 90% of packages

Maintenance88

Actively maintained with recent releases

Popularity12

Limited adoption so far

Community8

Small or concentrated contributor base

Maturity49

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Unknown

Total

1

Last Release

60d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/e07a1b668e9e01ee6d1b85de7b3be1c2513f68aae9494b2011d1592104d5daa0?d=identicon)[jardis](/maintainers/jardis)

---

Top Contributors

[![Headgent](https://avatars.githubusercontent.com/u/245725954?v=4)](https://github.com/Headgent "Headgent (1 commits)")

---

Tags

loaderversioningDomain Driven DesignHeadgentjardisjardisSupportclassversionversion class loader

###  Code Quality

TestsPHPUnit

Static AnalysisPHPStan

Code StylePHP\_CodeSniffer

Type Coverage Yes

### Embed Badge

![Health badge](/badges/jardissupport-classversion/health.svg)

```
[![Health](https://phpackages.com/badges/jardissupport-classversion/health.svg)](https://phpackages.com/packages/jardissupport-classversion)
```

###  Alternatives

[pragmarx/version

Take control over your Laravel app version

5921.2M2](/packages/pragmarx-version)[nikolaposa/version

Value Object that represents a SemVer-compliant version number.

1406.4M16](/packages/nikolaposa-version)[m1/env

Env is a lightweight library bringing .env file parser compatibility to PHP. In short - it enables you to read .env files with PHP.

6412.0M21](/packages/m1-env)[shivas/versioning-bundle

Symfony application versioning, simple console command to manage version (with providers e.g. git tag) of your application using Semantic Versioning 2.0.0 recommendations

1121.2M1](/packages/shivas-versioning-bundle)[naneau/semver

A decent, standards-compliant, Semantic Versioning (SemVer) parser and library

72496.2k13](/packages/naneau-semver)[phpmentors/domain-kata

Kata for domain models

73426.9k9](/packages/phpmentors-domain-kata)

PHPackages © 2026

[Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)