
Nat Herold - 2010-12-22 00:40:55
this:
if ( eregi("979", $this->isbn13) )
needs to be changed; my suggestion is:
if ( preg_match("/^979.*?/", $this->isbn13) )
otherwise it finds '979' anywhere in an isbn; e.g. throws an error if the isbn is a valid '9780393979213'