(PHP 5 >= 5.1.0, PHP 7) Exchange the array for another one.

(PHP 5 >= 5.3.0, PHP 7) Checks whether the doubly linked list is empty.

(PHP 5 >= 5.2.0, PHP 7) Sort the entries by value

(PHP 5 >= 5.1.0, PHP 7) Has children public

(PHP 5 >= 5.2.2, PHP 7) Gets the target of a link

(PHP 5 >= 5.1.0, PHP 7) Gets flags for the SplFileObject

(PHP 5 >= 5.2.2, PHP 7) Gets absolute path to file

(PHP 5 >= 5.3.0, PHP 7) Returns the value at the specified $index

(PHP 5 >= 5.1.0, PHP 7) Detach an observer

(PHP 5 >= 5.3.0, PHP 7) Shifts a node from the beginning of the doubly linked list