(PHP 5 >= 5.1.0, PHP 7) Gets the behavior flags.

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

(PHP 5 >= 5.1.2, PHP 7) Gets the file group

(PHP 5 >= 5.2.2, PHP 7) Gets the base name of the file

(PHP 5 >= 5.3.0, PHP 7) Removes an object from the storage

(PHP 5 >= 5.1.0, PHP 7) Attach an SplObserver

(PHP 5 >= 5.5.0, PHP 7) Add/insert a new value at the specified index

(PHP 5 >= 5.3.0, PHP 7) Returns the mode of iteration

(PHP 5 >= 5.3.0, PHP 7) Returns the data associated with an

(PHP 5 >= 5.1.0, PHP 7) Call a function for every element in an iterator