(PHP 5 >= 5.3.0, PHP 7, PHP 8)
Recorre un sistema de ficheros, de manera similar a la función glob().
$pattern, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO)$mode = "r", bool $useIncludePath = false, ?resource $context = null): SplFileObject