(PHP 5 >= 5.1.2, PHP 7) Gets file size public

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

(PHP 5 >= 5.3.0, PHP 7) Unsets the value at the specified $index

(PHP 5 >= 5.0.0, PHP 7) Create a new iterator from an ArrayObject instance

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

(PHP 5 >= 5.1.0, PHP 7) Get line number public

(PHP 5 >= 5.1.0, PHP 7) Copy the iterator into an array

(PHP 5 >= 5.3.0, PHP 7) Check whether the heap contains more nodes

(PHP 5 >= 5.1.0, PHP 7) Checks if the storage contains a specific object

(PHP 5 >= 5.1.2, PHP 7) Gets last access time of the file