note 84889 deleted from language.types.integer by googleguy
| From: | googleguy@php.net | Date: | Sat, 19 Jan 2013 03:40:00 +0000 |
| Subject: | note 84889 deleted from language.types.integer by googleguy | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-193215@lists.php.net to get a copy of this message | ||
Note Submitter: rustamabd at gmail dot com
----
Be very careful with code that relies on integer overflow. Negative overflow is handled differently
on different platforms. For example, this code:
<?php
echo (int)-3000000000; // a 32bit negative overflow
?>
... outputs 1294967296 on Windows, and -2147483648 on FreeBSD.
(Tested with php 5.2.6, freebsd 7.0)