“SPL” stands for Standard PHP Library. It is a collection of classes and interfaces that provide core functionality that is commonly used in PHP applications.
The SPL includes a variety of useful features, such as data structures like arrays, stacks, and queues, as well as iterators for traversing data structures, file system functions, and much more.
Using the SPL can help you write more efficient and maintainable PHP code by providing a standardized set of tools for common programming tasks.
Some examples of SPL classes and interfaces include