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Class to Handle, Convert and Validate ISBN Numbers
static string|false convert( string $isbnin, [integer $verfrom = ISBN_VERSION_ISBN_10], [integer $verto = ISBN_VERSION_ISBN_13])
static integer|false guessVersion( string $isbn)
Note: This is not Validation. To get the validated version of an ISBN Number use self::validate();
static integer|false validate( string $isbn, [integer $ver = ISBN_DEFAULT_INPUTVERSION])
ISBN __construct( [array $isbn = ''], [mixed $ver = ISBN_DEFAULT_INPUTVERSION])
string|false getCheckdigit( )
string|false getEAN( )
string|false getGroup( )
string getISBN( )
string|false getPublisher( )
string|false getTitle( )
integer|false getVersion( )
boolean isValid( )
void setISBN( string $isbn)