(PHP 5 >= 5.1.0, PHP 7) Write to file public

(PHP 5 >= 5.3.0, PHP 7) Sets a new value at a specified index

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

(PHP 5 >= 5.1.0, PHP 7) Construct a NoRewindIterator

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

(PHP 5 >= 5.1.2, PHP 7) Try all registered __autoload() function to load the requested class

(PHP 5, PHP 7) Return the key for the current element

(PECL spl_types >= 0.1.0) Returns all consts (possible values) as an array.

(PHP 5 >= 5.1.0, PHP 7) Notify an observer

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