PHP Manual
CallbackFilterIterator
Calls the callback with the current value, the current key and the inner iterator as arguments

CallbackFilterIterator::accept

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

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

public CallbackFilterIterator::accept(): bool

This method calls the callback with the current value, current key and the inner iterator.

The callback is expected to return true if the current item is to be accepted, or false otherwise.

This function has no parameters.

Returns true to accept the current item, or false otherwise.