(PHP 5 >= 5.3.0, PHP 7) Constructs a new stack implemented using a doubly linked list

(PHP 5 >= 5.3.0, PHP 7) Next element public

(PHP 5 >= 5.1.0, PHP 7) Forward to the next element

(PHP 5 >= 5.3.0, PHP 7) Check whether the queue contains more nodes

(PHP 5 >= 5.3.0, PHP 7) Sets the data associated with the current iterator entry

(PHP 5, PHP 7) Move forward to next DirectoryIterator item

(PHP 5 >= 5.2.0, PHP 7) Sort the entries with a user-defined comparison function and maintain key association

(PHP 5 >= 5.3.0, PHP 7) Constructs a new empty heap

(PHP 5 >= 5.3.0, PHP 7) Unserialize public

(PHP 5 >= 5.3.0, PHP 7) Return current node pointed by the iterator