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Isbn

Zend_Validate_Isbn allows you to validate an ISBN-10 or ISBN-13 value.

Supported options for Zend_Validate_Isbn

The following options are supported for Zend_Validate_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_Validate_Isbn::AUTO. For details take a look at this section.

Basic usage

A basic example of usage is below:

<?php
$validator 
= new Zend_Validate_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:

<?php
$validator 
= new Zend_Validate_Isbn();
$validator->setType(Zend_Validate_Isbn::ISBN13);
// OR
$validator = new Zend_Validate_Isbn(array(
    
'type' => Zend_Validate_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_Validate_Isbn::AUTO (default)

  • Zend_Validate_Isbn::ISBN10

  • Zend_Validate_Isbn::ISBN13

Specifying a separator restriction

An example of separator restriction is below:

<?php
$validator 
= new Zend_Validate_Isbn();
$validator->setSeparator('-');
// OR
$validator = new Zend_Validate_Isbn(array(
    
'separator' => '-',
));

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

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)

Zend Framework