RecursiveCallbackFilterIterator::__construct()

(PHP 5 >= 5.4.0, PHP 7)

Create a RecursiveCallbackFilterIterator from a RecursiveIterator

说明

publicRecursiveCallbackFilterIterator::__construct( RecursiveIterator$iterator, string $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