RecursiveCallbackFilterIterator::__construct

(PHP 5 >= 5.4.0, PHP 7, PHP 8)

RecursiveCallbackFilterIterator::__construct — Create a RecursiveCallbackFilterIterator from a RecursiveIterator

public RecursiveCallbackFilterIterator::__construct(RecursiveIterator $iterator, callable $callback)

Creates a filtered iterator from a RecursiveIterator using the callback to determine which items are accepted or rejected.

iterator

The recursive iterator to be filtered.

callback

The callback, which should return true to accept the current item or false otherwise. See Examples.

May be any valid callable value.

没有返回值。

RecursiveCallbackFilterIterator Examples
RecursiveCallbackFilterIterator::getChildren() - Return the inner iterator's children contained in a RecursiveCallbackFilterIterator
RecursiveCallbackFilteriterator::hasChildren() - Check whether the inner iterator's current element has children