(PECL wincache >= 1.1.0) Acquires an exclusive lock on a given key

(PHP 4, PHP 5, PHP 7) Find out whether an extension is loaded

(PHP 5 >= 5.2.0, PHP 7) Get the last occurred error

(PHP 4, PHP 5, PHP 7) Loads a PHP extension at runtime

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Gets all configuration options

(PECL inclued >= 0.1.0) Get the inclued data

(PECL apd 0.2-0.4) Throw a warning and a callstack

(PHP 4, PHP 5, PHP 7) Gets the inode of the current script

(PECL apd 0.2-0.4) Return all persistent resources as an array

(PECL runkit >= 0.7.0) Runkit Anti-Sandbox Class