(PHP 5 >= 5.3.6, PHP 7) Removes all objects except for those contained in another storage from the current

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

(PHP 5 >= 5.3.0, PHP 7) Counts the number of elements in the heap.

(PECL spl_types >= 0.1.0) Returns all consts (possible values) as an array.

(PHP 5 >= 5.4.0, PHP 7) Write a field array as a CSV line

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

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

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

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

(PHP 5 >= 5.3.0, PHP 7) Peeks at the node from the top of the heap