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jhnbrn90/cas-validator
======================

Parse and validate a given CAS number

079↓85.7%1PHP

Since Oct 22Pushed 3y ago1 watchersCompare

[ Source](https://github.com/Jhnbrn90/CasValidator)[ Packagist](https://packagist.org/packages/jhnbrn90/cas-validator)[ RSS](/packages/jhnbrn90-cas-validator/feed)WikiDiscussions master Synced 4mo ago

READMEChangelogDependenciesVersions (1)Used By (0)

CAS number validator
--------------------

[](#cas-number-validator)

This PHP package allows easy parsing and [validation of CAS numbers](https://chejunkie.com/knowledge-base/validate-cas-registry-numbers) as dictated by the ACS.

### Usage

[](#usage)

To use this package, first require it:

```
composer require jhnbrn90/cas-validator
```

Validating a CAS number is performed as follows:

```
use Jhnbrn90\CasValidator\CasNumberValidator;

$validatedCas = CasNumberValidator::validate('100-39-0');

// This will yield a `ValidCasNumber` or `InvalidCasNumber` DTO

$isValid = $validatedCas->isValid(); // boolean
```

###  Health Score

17

—

LowBetter than 6% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity11

Limited adoption so far

Community10

Small or concentrated contributor base

Maturity25

Early-stage or recently created project

 Bus Factor1

Top contributor holds 60% 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.

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/24190396?v=4)[John Braun](/maintainers/Jhnbrn90)[@Jhnbrn90](https://github.com/Jhnbrn90)

---

Top Contributors

[![Jhnbrn90](https://avatars.githubusercontent.com/u/24190396?v=4)](https://github.com/Jhnbrn90 "Jhnbrn90 (3 commits)")[![hlecorche](https://avatars.githubusercontent.com/u/188749?v=4)](https://github.com/hlecorche "hlecorche (2 commits)")

### Embed Badge

![Health badge](/badges/jhnbrn90-cas-validator/health.svg)

```
[![Health](https://phpackages.com/badges/jhnbrn90-cas-validator/health.svg)](https://phpackages.com/packages/jhnbrn90-cas-validator)
```

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