Isbn Validator

Zend\Validator\Isbn allows you to validate an ISBN-10 or ISBN-13 value.

Supported options

The following options are supported for Zend\Validator\Isbn:

Basic usage

A basic example of usage is below:

$validator = new Zend\Validator\Isbn();

if ($validator->isValid($isbn)) {
    // isbn is valid
} else {
    // isbn is not valid
}

This will validate any ISBN-10 and ISBN-13 without separator.

Setting an explicit ISBN validation type

An example of an ISBN type restriction follows:

use Zend\Validator\Isbn;

$validator = new Isbn();
$validator->setType(Isbn::ISBN13);

// OR
$validator = new Isbn([ 'type' => Isbn::ISBN13]);

if ($validator->isValid($isbn)) {
    // this is a valid ISBN-13 value
} else {
    // this is an invalid ISBN-13 value
}

The above will validate only ISBN-13 values.

Valid types include:

Specifying a separator restriction

An example of separator restriction:

$validator = new Zend\Validator\Isbn();
$validator->setSeparator('-');

// OR
$validator = new Zend\Validator\Isbn(['separator' => '-']);

if ($validator->isValid($isbn)) {
    // this is a valid ISBN with separator
} else {
    // this is an invalid ISBN with separator
}

Values without separators

This will return false if $isbn doesn't contain a separator or if it's an invalid ISBN value.

Valid separators include: