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markfullmer/porter2
===================

Stem words using the English Porter 2 algorithm

1.0(9y ago)1628.2k[2 PRs](https://github.com/markfullmer/porter2/pulls)1MITPHP

Since Apr 7Pushed 4y ago1 watchersCompare

[ Source](https://github.com/markfullmer/porter2)[ Packagist](https://packagist.org/packages/markfullmer/porter2)[ RSS](/packages/markfullmer-porter2/feed)WikiDiscussions master Synced 3w ago

READMEChangelogDependencies (1)Versions (3)Used By (1)

Porter 2 Stemmer for PHP
========================

[](#porter-2-stemmer-for-php)

[![Circle CI](https://camo.githubusercontent.com/c5b3b32e6b6bf4902cf9d8d057af450f3ccb0aa5fac0396086bb58fc6f17ac09/68747470733a2f2f636972636c6563692e636f6d2f67682f6d61726b66756c6c6d65722f706f72746572322e7376673f7374796c653d736869656c64)](https://circleci.com/gh/markfullmer/porter2)[![GitHub license](https://camo.githubusercontent.com/7013272bd27ece47364536a221edb554cd69683b68a46fc0ee96881174c4214c/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d626c75652e737667)](https://raw.githubusercontent.com/markfullmer/porter2/master/LICENSE)

A PHP library for stemming words using the English Porter 2 algorithm.

[![Screenshot of Conversion](https://raw.githubusercontent.com/markfullmer/porter2/master/demo/stemmer-demo.png)](https://raw.githubusercontent.com/markfullmer/porter2/master/demo/stemmer-demo.png)

Background
----------

[](#background)

A stemmer takes a given word and follows a set of rules to reduce this word to search-index-usable stem (as opposed to the actual word root). For example, *aggravate*, *aggravated*, and *aggravates* all reduce to "aggrav," thus creating a commonality between those words.

Martin Porter's English (Porter 2) Algorithm improves on the original Porter stemmer as described [here](http://snowball.tartarus.org/algorithms/english/stemmer.html).

Basic Usage
-----------

[](#basic-usage)

The included `/demo/index.php` file contains a conversion form demonstration.

Make your code aware of the `Porter2` class via your favorite method (e.g., `use` or `require`)

Then pass a string of text into the class:

```
$text = Porter2::stem('consistently');
echo $text; // consist

$text = Porter2::stem('consisting');
echo $text; // consist

$text = Porter2::stem('consistency');
echo $text; // consist
```

Stemmer Resources
-----------------

[](#stemmer-resources)

- [Step definition for the Porter 2 stemmer](http://snowball.tartarus.org/algorithms/english/stemmer.html)

Tests
-----

[](#tests)

A verification list of 29,000 words and their expected stems can be run (after `composer install` via `phpunit`).

###  Health Score

35

—

LowBetter than 77% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity32

Limited adoption so far

Community9

Small or concentrated contributor base

Maturity64

Established project with proven stability

 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

3328d ago

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/4305692?v=4)[Mark Fullmer](/maintainers/markfullmer)[@markfullmer](https://github.com/markfullmer)

---

Top Contributors

[![markfullmer](https://avatars.githubusercontent.com/u/4305692?v=4)](https://github.com/markfullmer "markfullmer (11 commits)")

---

Tags

corpusphpportersearch-algorithmstemmer

###  Code Quality

TestsPHPUnit

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