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

(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, PHP 7) Return the key for the current element

(PHP 5 >= 5.1.0, PHP 7) Check whether the current element of the inner iterator has children

(PHP 5 >= 5.3.0, PHP 7) Begin children public

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

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

(PHP 5 >= 5.2.0, PHP 7) Return hash id for given object

(PHP 5, PHP 7) Check whether current DirectoryIterator position is a valid file