(PECL apd >= 0.2) Starts the session debugging

(PHP 4, PHP 5, PHP 7) Alias of

(PECL runkit >= 0.7.0) Check the PHP syntax of the specified php code

(PECL apcu >= 4.0.0) Removes a stored variable from the cache

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

(PECL apc >= 3.1.1) Checks if current position is valid

(PHP 4, PHP 5, PHP 7) Gets time of last page modification

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Return a list of .ini files parsed from the additional ini dir

(PECL apc >= 3.0.13) Cache a new variable in the data store

(PECL wincache >= 1.1.0) Adds a variable in user cache only if variable does not already exist in the cache