(PHP 5 >= 5.3.0)
The Filesystem iterator
$path
   [, int $flags = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS
  ] )FilesystemIterator::CURRENT_AS_PATHNAME
     Makes FilesystemIterator::current() return the pathname.
FilesystemIterator::CURRENT_AS_FILEINFO
     Makes FilesystemIterator::current() return an SplFileInfo instance.
FilesystemIterator::CURRENT_AS_SELF
     Makes FilesystemIterator::current() return $this (the FilesystemIterator).
FilesystemIterator::CURRENT_MODE_MASK
     FilesystemIterator::KEY_AS_PATHNAME
     Makes FilesystemIterator::key() return the pathname.
FilesystemIterator::KEY_AS_FILENAME
     Makes FilesystemIterator::key() return the filename.
FilesystemIterator::FOLLOW_SYMLINKS
     Makes RecursiveDirectoryIterator::hasChildren() follow symlinks.
FilesystemIterator::KEY_MODE_MASK
     FilesystemIterator::NEW_CURRENT_AND_KEY
     Same as FilesystemIterator::KEY_AS_FILENAME | FilesystemIterator::CURRENT_AS_FILEINFO.
FilesystemIterator::SKIP_DOTS
     Skips dot files (. and ..).
FilesystemIterator::UNIX_PATHS
     Makes paths use Unix-style forward slash irrespective of system default.
| Version | Description | 
|---|---|
| 5.3.1 | Added FilesystemIterator::FOLLOW_SYMLINKS |