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RecursiveIteratorIterator::rewind — Rewind the iterator to the first element of the top level inner iterator RecursiveIteratorIterator::setMaxDepth — Set max depth
- OuterIterator
The OuterIterator interface Introduction ¶ Classes...
- RegexIterator
RegexIterator Flags ¶ RegexIterator::USE_KEY Special flag:...
- GlobIterator
The GlobIterator class
- MultipleIterator
The MultipleIterator class Table of Contents ¶...
- RecursiveIterator
The RecursiveIterator interface Introduction ¶ Classes...
- RecursiveTreeIterator
The RecursiveTreeIterator class
- CallbackFilterIterator
Table of Contents ¶ CallbackFilterIterator::accept — Calls...
- FilterIterator
The FilterIterator class Introduction ¶ This abstract...
- OuterIterator
Jun 5, 2024 · in this post we're going to over two features of php that help make recursion easier: the RecursiveIterator interface, which provides us with methods and features that make writing recursive functions easier, and the dreadfully-named RecursiveIteratorIterator class which we can use to flatten down arbitrarily-deep data structures.
- Recursive and Non-Recursive Iterators
- RecursiveIteratorIterator
- IteratorIterator
- Summary
PHP has non-"recursive" iterators, such as ArrayIterator and FilesystemIterator. There are also "recursive" iterators such as the RecursiveArrayIterator and RecursiveDirectoryIterator. The latter have methods enabling them to be drilled down into, the former do not. When instances of these iterators are looped over on their own, even the recursive ...
This is where the RecursiveIteratorIterator comes in to play. It has the knowledge of how to call the "recursible" iterators in such a way as to drill down into the structure in a normal, flat, loop. It puts the recursive behaviour into action. It essentially does the work of stepping over each of the values in the iterator, looking to see if there...
The job of the IteratorIterator is to take any Traversable object, and wrap it such that it satisfies the Iteratorinterface. A use for this is to then be able to apply iterator-specific behaviour on the non-iterator object. To give a practical example, the DatePeriod class is Traversable but not an Iterator. As such, we can loop over its values wit...
RecursiveIteraratorIterator is for iterating over a RecursiveIterator("recursible" iterator), exploiting the recursive behaviour that is available. IteratorIterator is for applying Iterator behaviour to non-iterator, Traversableobjects.
RecursiveIteratorIterator::key — Access the current key RecursiveIteratorIterator::next — Move forward to the next element RecursiveIteratorIterator::nextElement — Next element RecursiveIteratorIterator::rewind — Rewind the iterator to the first element of the top level inner iterator RecursiveIteratorIterator::setMaxDepth — Set max depth
Simple usage example of `RecursiveIteratorIterator::key ()`. The RecursiveIteratorIterator::key function is used to access the current key of the iteration. It is specifically designed to work with iterators that implement the RecursiveIterator interface, which allows traversing hierarchical structures.
RecursiveIteratorIterator::key — Access the current key RecursiveIteratorIterator::next — Move forward to the next element RecursiveIteratorIterator::nextElement — Next element RecursiveIteratorIterator::rewind — Rewind the iterator to the first element of the top level inner iterator RecursiveIteratorIterator::setMaxDepth — Set max depth
People also ask
Does PHP have a recursive iterator?
What is recursiveiterator?
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RecursiveIteratorIterator::getMaxDepth — Get max depth RecursiveIteratorIterator::getSubIterator — The current active sub iterator RecursiveIteratorIterator::key — Access the current key RecursiveIteratorIterator::next — Move forward to the next element RecursiveIteratorIterator::nextElement — Next element
