CallbackFilterIterator::__construct()

(PHP 5>=5.4.0,PHP 7)

Create a filtered iterator from another iterator

说明

publicCallbackFilterIterator::__construct(Iterator$iterator,callable $callback)

Creates a filtered iterator using the$callbackto determine which items are accepted or rejected.

$iterator

The iterator to be filtered.

$callback

The callback,which should returnTRUEto accept the current item orFALSEotherwise.SeeExamples.

May be any validcallablevalue.

没有返回值。

CallbackFilterIterator Examples
CallbackFilterIterator::accept() Calls the callback with the current value,the current key and the inner iterator as arguments