SPL is a collection of classes and interfaces providing an API for built-in PHP functions, allowing developers to write fully object oriented code with standard tools, using PHP in a
much more elegant way.
Стандартная библиотека PHP (Standard PHP Library, или SPL) — это набор интерфейсов и классов, которые которые решают общие задачи.
Библиотека SPL предлагает разработчику набор стандартных структур данных, итераторов для обхода объектов, наборы интерфейсов и стандартных исключений, ряд классов для работы с файлами и набор функций наподобие spl_autoload_register().
SPL is a collection of classes and interfaces providing an API for built-in PHP functions, allowing developers to write fully object oriented code with standard tools, using PHP in a
much more elegant way.
SPL provides a standard set of interfaces for PHP5. The aim of SPL is to implement some efficient data access interfaces and classes for PHP. Functionally it is designed to traverse aggregate structures (anything you want to loop over). These may include arrays, database result sets, xml trees, directory listings or any list at all. Currently SPL deals with Iterators.