(PHP 5 >= 5.1.0, PHP 7)
OuterIterator::getInnerIterator — Returns the inner iterator for the current entry
public OuterIterator::getInnerIterator ( ) : Iterator
Returns the inner iterator for the current iterator entry.
This function has no parameters.
The inner iterator for the current entry.
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https://www.php.net/manual/en/outeriterator.getinneriterator.php