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

(PHP 5 >= 5.1.0, PHP 7) The key() method public

(PHP 5 >= 5.1.0, PHP 7) Next element public

(PHP 5 >= 5.1.0, PHP 7) Retrieve current line of file

(PHP 5, PHP 7) Get size of current DirectoryIterator item

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

(PHP 5 >= 5.3.0, PHP 7) Detaches an iterator

(PHP 5 >= 5.3.0, PHP 7) Prepends the doubly linked list with an element

(PHP 5 >= 5.4.0, PHP 7) Serializes the storage

(PHP 5 >= 5.1.0, PHP 7) Alias of