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

(PHP 5 >= 5.0.0, PHP 7) Sets the value at the specified index to newval

(PHP 5 >= 5.3.0, PHP 7) Return current node index

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

(PHP 5 >= 5.2.2, PHP 7) Unserializes a storage from its string representation

(PHP 5 >= 5.3.0, PHP 7) Sets a new value at a specified index

(PHP 5 >= 5.1.0, PHP 7) Returns if an iterator can be created fot the current entry.

(PHP 5 >= 5.1.2, PHP 7) Alias of

(PHP 5 >= 5.1.2, PHP 7) Tells if the file is a directory

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