/**
* Get ISBN-10 Registration Group Data by its numeric ID
*
* @param integer $id Registration Group Identifier
*
* @return mixed array: group array
* boolean: False if failed
*/
function _getISBN10Group($id)
{
$r = settype($id, 'integer');
if ($r === false) {
return false;
}
$groups = ISBN::_getISBN10Groups();
if ($groups === false) {
return false;
}
if (isset($groups[$id]) === false) {
return false;
}
$group = $groups[$id];
return $group;
}
