NoRewindIterator::valid
ParentIterator is just a RecursiveFilterIterator whos accept() method calls the RecursiveFilterIterator->hasChildren() method to filter itself.
Basically, it filters out leaf nodes. For example
This would yield all files and directories
<?php
$rdi = new RecursiveDirectoryIterator(__DIR__);
$iter = new RecursiveIteratorIterator($rdi, RecursiveIteratorIterator::CHILD_FIRST);
?>
wrapping that in a ParentIterator would filter it down to just directories
<?php
$rdi = new RecursiveDirectoryIterator(__DIR__);
$iter = new RecursiveIteratorIterator($rdi, RecursiveIteratorIterator::CHILD_FIRST);
$dirsOnly = new ParentIterator($iter);
?>
The ParentIterator class
(PHP 5 >= 5.1.0)
Introduction
This extended FilterIterator allows a recursive iteration using RecursiveIteratorIterator that only shows those elements which have children.
Class synopsis
/* Methods */
}Table of Contents
- ParentIterator::accept — Determines acceptability
- ParentIterator::__construct — Constructs a ParentIterator
- ParentIterator::getChildren — Return the inner iterator's children contained in a ParentIterator
- ParentIterator::hasChildren — Check whether the inner iterator's current element has children
- ParentIterator::next — Move the iterator forward
- ParentIterator::rewind — Rewind the iterator
add a note
User Contributed Notes
ParentIterator - [1 notes]
Anonymous ¶
1 year ago