- filter_var: documentation ( source)
<?php
function validateNumber($number) {
try {
$number = filter_var($number, FILTER_VALIDATE_INT);
if(!$number) {
throw new PageNotAnInteger('That dddddpage number is not an integer');
}
}
catch(Exception $e) {
throw new PageNotAnInteger('That page number is not an integer');
}
}
validateNumber('a0');