Online PHP editor | refs for 9RWnR

<?php class InvalidPage extends Exception {} class PageNotAnInteger extends InvalidPage {} function validateNumber($number) { $number = filter_var($number, FILTER_VALIDATE_INT); if(!$number) { throw new PageNotAnInteger('That dddddpage number is not an integer'); } throw new PageNotAnInteger('That page number is not an integer'); } validateNumber('a0');