nicebooks / isbn
ISBN tools
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Requires
- php: ^8.1
Requires (Dev)
- ext-dom: *
- brick/varexporter: ~0.4.0
- php-coveralls/php-coveralls: ^2.5.2
- phpunit/phpunit: ^10.3
- vimeo/psalm: 5.15.0
- dev-master
- 0.4.37
- 0.4.36
- 0.4.35
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- dev-isbn_subclass
- dev-php81
This package is auto-updated.
Last update: 2024-11-05 19:53:27 UTC
README
This library provides the functionality to validate, format and convert ISBN numbers, that powers the nicebooks.com website. It is released under a permissive MIT open-source license for anyone to use.
ISBN formatting follows the rules defined by the ISBN range file published by ISBN International.
Installation
This library is installable via Composer:
composer require nicebooks/isbn
Requirements
The current version of this library requires PHP 8.1 or higher.
You may use earlier versions of nicebooks/isbn
with earlier versions of PHP, but you will only receive ISBN range updates if you use the latest version.
Project status & release process
While this library is still under development, it is well tested and should be stable enough to use in production environments. It is currently in use in production on nicebooks.com.
The current releases are numbered 0.x.y
. When a non-breaking change is introduced (updating ISBN ranges,
adding new methods, optimizing existing code, etc.), y
is incremented.
When a breaking change is introduced, a new 0.x
version cycle is always started.
It is therefore safe to lock your project to a given release cycle, such as 0.4.*
.
If you need to upgrade to a newer release cycle, check the release history
for a list of changes introduced by each further 0.x.0
version.
Overview
The IsbnTools
class
This class contains all the tools to work with ISBN numbers as plain strings.
use Nicebooks\Isbn\IsbnTools; $tools = new IsbnTools();
Its constructor offers two configurable parameters:
public function __construct(bool $cleanupBeforeValidate = true, bool $validateCheckDigit = true)
$cleanupBeforeValidate
removes any non-alphanumeric ASCII character from the string before validating it.$validateCheckDigit
computes the checksum of the ISBN number before any operation.
Method summary:
-
isValidIsbn(string $isbn) : bool
checks that the given ISBN is valid.var_export($tools->isValidIsbn('123456789X')); // true var_export($tools->isValidIsbn('9781234567897')); // true
-
isValidIsbn10(string $isbn) : bool
checks that the given ISBN is a valid ISBN-10.var_export($tools->isValidIsbn10('123456789X')); // true
-
isValidIsbn13(string $isbn) : bool
checks that the given ISBN is a valid ISBN-13.var_export($tools->isValidIsbn13('9781234567897')); // true
-
convertIsbn10to13(string $isbn) : string
converts the given ISBN-10 to an ISBN-13.var_export($tools->convertIsbn10to13('123456789X')); // '9781234567897'
-
convertIsbn13to10(string $isbn) : string
converts the given ISBN-13 to an ISBN-10.var_export($tools->convertIsbn13to10('9781234567897')); // '123456789X'
-
format(string $isbn) : string
formats the given ISBN by adding hyphens at the proper places.var_export($formatter->format('123456789X')); // '1-234-56789-X' var_export($formatter->format('9781234567897')); // '978-1-234-56789-7'
The Isbn
classes
The Isbn
class is an abstract, immutable class representing a valid ISBN-10 or ISBN-13.
It is an alternate way to access the functionality provided by IsbnTools
, and offers a convenient way to pass an ISBN number around,
guaranteeing both its validity and its integrity.
Isbn
has 2 subclasses: Isbn10
and Isbn13
, allowing for narrower typing if your application expects only ISBN-10 or only ISBN-13 at some point.
An Isbn
instance is obtained with the of()
factory method:
use Nicebooks\Isbn\Isbn; $isbn = Isbn::of('123456789X'); // will return an instance of Isbn10 $isbn = Isbn::of('9781234567897'); // will return an instance of Isbn13
You can also use the Isbn10::of()
and Isbn13::of()
factory methods:
Isbn10::of('123456789X'); // equivalent to Isbn::of('123456789X')->to10(); Isbn13::of('9781234567897'); // equivalent to Isbn::of('9781234567897')->to13();
Method summary:
is10(): bool
Returnstrue
for an ISBN-10, orfalse
for an ISBN-13.is13(): bool
Returnstrue
for an ISBN-13, orfalse
for an ISBN-10.isConvertibleTo10(): bool
Returnstrue
if the ISBN can be converted to an ISBN-10,false
otherwise.to10(): Isbn10
Converts the ISBN to an ISBN-10, or throws anIsbnNotConvertibleException
to13(): Isbn13
Converts the ISBN to an ISBN-13format(): string
Returns the formatted representation of the ISBN.
Exceptions
Exceptions live in the Nicebooks\Isbn\Exception
namespace.
InvalidIsbnException
is thrown when an invalid ISBN is detectedIsbnNotConvertibleException
is thrown when trying to convert an ISBN-13 that does not start with978
to an ISBN-10.