(PHP 5 >= 5.0.0, PHP 7) Get the number of public properties in the ArrayObject

(PHP 5 >= 5.1.0, PHP 7) Returns whether current entry is an array or an object.

(PHP 5 >= 5.1.0, PHP 7) Check whether the current element is valid

(PHP 5 >= 5.1.0, PHP 7) Move the iterator forward

(PHP 5 >= 5.1.2, PHP 7) Tells if file is readable

(PHP 5 >= 5.1.0, PHP 7) Gets character from file

(PHP 5 >= 5.1.2, PHP 7) Tells if the entry is writable

(PHP 5 >= 5.0.0, PHP 7) Creates a copy of the ArrayObject.

(PHP 5, PHP 7) Get last access time of the current DirectoryIterator item

(PHP 5 >= 5.2.0, PHP 7) Sets the operation mode.