(PHP 5 >= 5.1.0, PHP 7, PHP 8)
RecursiveIterator::getChildren — Returns an iterator for the current entry
public RecursiveIterator::getChildren(): ?RecursiveIterator
Returns an iterator for the current iterator entry.
This function has no parameters.
Returns an iterator for the current entry if it exists, or null otherwise.
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https://www.php.net/manual/en/recursiveiterator.getchildren.php