(PHP 4, PHP 5, PHP 7) Limits the maximum execution time

(PHP 4, PHP 5, PHP 7) Gets the current active configuration setting of magic_quotes_runtime

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Returns information about the operating system PHP is running on

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Compares two "PHP-standardized" version number strings

(PHP 4, PHP 5, PHP 7) Checks if assertion is FALSE

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Get PHP script owner's GID

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