SPL - Standard PHP Library SPL is a collection of interfaces and classes that are meant to solve standard problems and implements some efficient data access interfaces and classes.

• 嘿嘿，上面这段英语有点蹩脚，不过没关系，官方是这么说的，就这么引用，我们理解大概意思就成：SPL是一个“解决一些常见问题，实现一些高效的数据访问”的类和接口的集合。