fails with WordPress 4.9.7

Well, in fact it’s not directly a problem with the plugin, it’s related to PHP : the ereg function is now deprecated so another function called preg_match must be used instead.

SO I just changed line 106 of the openbook_utilities.php file as such :

//test if 10 or 13 digits ISBN
function openbook_utilities_validISBN($testisbn) {
return (preg_match (“/([0-9]{10})/”, $testisbn, $regs) || preg_match (“/([0-9]{13})/”, $testisbn, $regs));
}

and it works again ! ??

I’m getting a different set of error messages since upgrading:

Warning: count(): Parameter must be an array or an object that implements Countable in /home/edweiss/webapps/updatedpinkwater/wp-content/plugins/openbook-book-data/libraries/openbook_openlibrary.php on line 101

Warning: Use of undefined constant “ – assumed ‘“’ (this will throw an Error in a future version of PHP) in /home/edweiss/webapps/updatedpinkwater/wp-content/plugins/openbook-book-data/libraries/openbook_utilities.php on line 107

Warning: A non-numeric value encountered in /home/edweiss/webapps/updatedpinkwater/wp-content/plugins/openbook-book-data/libraries/openbook_utilities.php on line 107

Warning: Division by zero in /home/edweiss/webapps/updatedpinkwater/wp-content/plugins/openbook-book-data/libraries/openbook_utilities.php on line 107

Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /home/edweiss/webapps/updatedpinkwater/wp-content/plugins/openbook-book-data/libraries/openbook_utilities.php on line 107

Any idea what these are about?