- var_dump: documentation ( source)
- filter_var: documentation ( source)
<?php
function filter($val) {
var_dump(filter_var($val, FILTER_VALIDATE_INT));
}
filter(0);
filter(01);
filter('0');
filter('10');
filter('01'); // wat?
filter('');
filter(array());
filter(array(1));
filter(0.2);
filter('0.2');