Isbn Validator

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

Supported options for Zend\Validator\Isbn

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

• separator: Defines the allowed separator for the ISBN number. It defaults to an empty string.
• type: Defines the allowed type of ISBN numbers. It defaults to Zend\Validator\Isbn::AUTO. For details take a look at this section.

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 is below:

$validator = new Zend\Validator\Isbn();
$validator->setType(Zend\Validator\Isbn::ISBN13);
// OR
$validator = new Zend\Validator\Isbn(array(
    'type' => Zend\Validator\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:

• Zend\Validator\Isbn::AUTO (default)
• Zend\Validator\Isbn::ISBN10
• Zend\Validator\Isbn::ISBN13

Specifying a separator restriction

An example of separator restriction is below:

$validator = new Zend\Validator\Isbn();
$validator->setSeparator('-');
// OR
$validator = new Zend\Validator\Isbn(array(
    'separator' => '-',
));

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

Note

Values without separator

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

Valid separators include:

• “” (empty) (default)
• “-” (hyphen)
• ” ” (space)