(PHP 4, PHP 5, PHP 7) Returns an array with the names of included or required files

(PHP 5, PHP 7 >= 5.5.0, PHP 7) Sets the process title

(PHP 5 >= 5.2.0, PHP 7) Returns the peak of memory allocated by PHP

(PHP 4, PHP 5) Sets the current active configuration setting of magic_quotes_runtime

(PHP 5 >= 5.3.0, PHP 7) Activates the circular reference collector

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Gets the current include_path configuration option

(PHP 4, PHP 5, PHP 7) Gets the version of the current Zend engine

(PHP 4, PHP 5, PHP 7) Gets the value of an environment variable

(PHP 4, PHP 5, PHP 7) Sets the value of a configuration option

(PHP 4, PHP 5, PHP 7) Gets the current PHP version