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

(PECL runkit >= 0.7.0) Replace a function definition with a new implementation

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

(PECL apc >= 3.1.1) Get total cache size public

(PECL apcu >= 4.0.0) Decrease a stored number

(PECL wincache >= 1.1.0) Gets a variable stored in the user cache

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

(PECL uopz >= 1.0.0) Undefine a constant void

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Generates a user-level error/warning/notice message

(PECL apcu >= 5.0.0) Move pointer to next item