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

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

(PHP 4, PHP 5, PHP 7) Set/get the various assert flags

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

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns an associative array with the names of all the constants and their

(PHP 4, PHP 5, PHP 7) Returns an array with the names of all modules compiled and loaded

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

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

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