Answer
SPL Iterators allow efficient traversal of large datasets with objects like DirectoryIterator, ArrayIterator, and RecursiveIterator.
Quick Answer
SPL Iterators implement the Iterator interface, enabling custom objects to work with foreach. ArrayIterator wraps arrays, DirectoryIterator traverses directories, RecursiveIteratorIterator walks tree structures. Iterators are memory-efficient for large datasets - load one item at a time instead of all at once. Implementing IteratorAggregate is simpler than full Iterator for collection classes.
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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