xref: /PHP-8.2/ext/filter/tests/048.phpt (revision 74859783)
1--TEST--
2Hex integer overflow
3--EXTENSIONS--
4filter
5--FILE--
6<?php
7function hex_inc($s) {
8    $len = strlen($s);
9    while ($len > 0) {
10        $len--;
11        if ($s[$len] != 'f') {
12            if ($s[$len] == '9') {
13                $s[$len] = 'a';
14            } else {
15                $s[$len] = $s[$len] + 1;
16            }
17            return $s;
18        }
19        $s[$len] = '0';
20    }
21    return '1'.$s;
22}
23
24
25$s = sprintf("%x", PHP_INT_MAX);
26var_dump(is_long(filter_var('0x'.$s, FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX))));
27
28$s = hex_inc($s);
29var_dump(is_long(filter_var('0x'.$s, FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX))));
30
31$s = sprintf("%x", ~0);
32var_dump(is_long(filter_var('0x'.$s, FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX))));
33
34$s = hex_inc($s);
35var_dump(filter_var('0x'.$s, FILTER_VALIDATE_INT, array("flags"=>FILTER_FLAG_ALLOW_HEX)));
36?>
37--EXPECT--
38bool(true)
39bool(true)
40bool(true)
41bool(false)
42