There are some inconsistencies with the `resources/php_compact_info.json`. For example, `ArrayAccess` and `Iterator`, for example, are both attributed to PHP 5.3.0 instead of 5.0.0 as stated in the PHP documentation.
Instead of trying to work out why this happened, I figure that it would be better to update `scripts/update_compact_info.php` to work with the latest version of PHP_CompatInfo (version 3.1.0). The only caveat here is that v3.0.0+ of PHP_CompatInfo requires PHP 5.3.0. Since this script is intended only for developers and is rarely used, this shouldnt be a significant issue.