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

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

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

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

(PHP 5 >= 5.5.0, PHP 7) Reinitialises the array after being unserialised

(PHP 5 >= 5.3.0, PHP 7) Compare priorities in order to place elements correctly in the heap while sifting

(PHP 5 >= 5.1.0, PHP 7) Get maximum line length

(PHP 5 >= 5.1.2, PHP 7) Alias of

(PHP 5 >= 5.3.0, PHP 7) Checks whether the doubly linked list is empty.

(PHP 5 >= 5.1.2, PHP 7) Gets the last modified time