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The FilterIterator class Introduction ¶ This abstract iterator filters out unwanted values. This class should be extended to implement custom iterator filters. The FilterIterator::accept () must be implemented in the subclass.
Table of Contents FilterIterator::accept — Check whether the current element of the iterator is acceptable FilterIterator::__construct — Construct a filterIterator FilterIterator::current — Get the current element value FilterIterator::getInnerIterator — Get the inner iterator FilterIterator::key — Get the current key
Simple usage example of `FilterIterator::key ()`. The `FilterIterator::key` function is a PHP function used to retrieve the key of the current element in a filtered iterator. It allows developers to access the key associated with the current element while iterating over a filtered set of data.
May 21, 2025 · PHP provides several useful built-in iterators in the Standard PHP Library (SPL) that solve common iteration problems. These include ArrayIterator, FilterIterator, LimitIterator, and more.
/* Inherited methods */ publicmixedcurrent () publicIteratornullgetInnerIterator () publicmixedkey () publicvoidnext () publicvoidrewind () publicboolvalid () Table of Contents FilterIterator::accept — Check whether the current element of the iterator is acceptable FilterIterator::__construct — Construct a filterIterator
May 1, 2025 · The accept() method is the heart of a FilterIterator: it determines whether the current element passes the filter.
Sep 13, 2023 · Traversing, filtering and manipulating data with PHP iterators. How to create custom Iterator and FilterIterator.
