CallbackFilterIterator::__construct

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

CallbackFilterIterator::__construct — Create a filtered iterator from another iterator

public CallbackFilterIterator::__construct ( Iterator $iterator , callable $callback )

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

iterator

The 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。

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

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