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pfazzi/isbn
===========

A PHP 7.2+ library for working with International Standard Book Numbers (ISBN)

v0.1.2(7y ago)1131MITPHPPHP ^7.2

Since May 13Pushed 7y ago1 watchersCompare

[ Source](https://github.com/pfazzi/isbn)[ Packagist](https://packagist.org/packages/pfazzi/isbn)[ RSS](/packages/pfazzi-isbn/feed)WikiDiscussions master Synced 3d ago

READMEChangelogDependencies (5)Versions (3)Used By (1)

pfazzi/isbn
===========

[](#pfazziisbn)

pfazzi/isbn is a PHP 7.2+ library for working with International Standard Book Numbers.

About
-----

[](#about)

From [Wikipedia](http://en.wikipedia.org/wiki/Universally_unique_identifier):

> The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique.\[a\]\[b\] Publishers purchase ISBNs from an affiliate of the International ISBN Agency.\[1\]
>
> An ISBN is assigned to each edition and variation (except reprintings) of a book. For example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN. The ISBN is ten digits long if assigned before 2007, and thirteen digits long if assigned on or after 1 January 2007. The method of assigning an ISBN is nation-specific and varies between countries, often depending on how large the publishing industry is within a country.
>
> The initial ISBN identification format was devised in 1967, based upon the 9-digit Standard Book Numbering (SBN) created in 1966. The 10-digit ISBN format was developed by the International Organization for Standardization (ISO) and was published in 1970 as international standard ISO 2108 (the 9-digit SBN code can be converted to a 10-digit ISBN by prefixing it with a zero digit "0").

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

[](#installation)

The preferred method of installation is via [Packagist](https://packagist.org/packages/ramsey/uuid) and [Composer](http://getcomposer.org/). Run the following command to install the package and add it as a requirement to your project's `composer.json`:

```
composer require pfazzi/isbn
```

###  Health Score

22

—

LowBetter than 22% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity7

Limited adoption so far

Community9

Small or concentrated contributor base

Maturity45

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

Every ~0 days

Total

2

Last Release

2558d ago

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/4489261?v=4)[Patrick Luca Fazzi](/maintainers/pfazzi)[@pfazzi](https://github.com/pfazzi)

---

Top Contributors

[![pfazzi](https://avatars.githubusercontent.com/u/4489261?v=4)](https://github.com/pfazzi "pfazzi (7 commits)")

---

Tags

identifierisbnphpphp7value-object

###  Code Quality

Code StylePHP\_CodeSniffer

### Embed Badge

![Health badge](/badges/pfazzi-isbn/health.svg)

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

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