(PHP 5 >= 5.1.2, PHP 7) Gets the inode change time

(PHP 5 >= 5.1.0, PHP 7) Portable file locking

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

(PHP 5 >= 5.0.0, PHP 7) Appends the value

(PHP 5 >= 5.0.0, PHP 7) Returns the value at the specified index

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

(PHP 5, PHP 7) Get the current depth of the recursive iteration

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

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

(PHP 5 >= 5.3.0, PHP 7) Serialize an ArrayObject