Zend_Validate_Isbn allows you to validate an
ISBN-10 or ISBN-13 value.
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.
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.
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::ISBN10Zend_Validate_Isbn::ISBN13
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)