此扩展只能在php 5.0以后使用
Note:
此扩展从PHP 5.3.0 不再被关闭,会一直有效.成为php内核组件一部份
ajai at nospam dot bitblit dot net (2011-09-19 08:20:13)
The spl USE flag in Gentoo is deprecated now - it is automatically switched on for PHP versions >= 5.3.
Jarno (2011-01-18 02:58:41)
On Gentoo you need to have spl USE flag set.