Answer
SPL provides interfaces, iterators, and data structures like SplStack and SplQueue to write efficient, reusable code.
Quick Answer
SPL (Standard PHP Library) is a collection of data structures and interfaces. Includes SplStack, SplQueue, SplHeap, SplDoublyLinkedList, SplFixedArray for typed arrays. Also provides iterators and file handling classes. Using proper data structures improves performance over plain arrays. SplFixedArray is faster and uses less memory than array for numeric-indexed fixed-size collections.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ