(PHP 5 >= 5.2.0, PHP 7) Sort an array naturally

(PHP 5, PHP 7) Determine if current DirectoryIterator item can be read

(PHP 5 >= 5.1.0, PHP 7) Get current key public

(PHP 5 >= 5.3.0, PHP 7) Get current element

(PHP 5 >= 5.3.0, PHP 7) Get the postfix public

(PHP 5, PHP 7) Determine if current DirectoryIterator item can be written to

(PHP 5 >= 5.2.0, PHP 7) The offsetSet purpose

(PHP 5 >= 5.1.0, PHP 7) Seek to the given position

(PHP 5, PHP 7) Check whether the current element is valid

(PHP 5 >= 5.1.0, PHP 7) Rewind the iterator