(PHP 5, PHP 7) Returns a unique identifier for the current thread

(PHP 4, PHP 5) Alias of

(PHP 5 >= 5.2.1, PHP 7) Returns directory path used for temporary files

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Returns the type of interface between web server and PHP

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

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

(PHP 5 >= 5.2.4, PHP 7) Retrieve a path to the loaded php.ini file

(PHP 5, PHP 7 >= 5.5.0, PHP 7) Returns the current process title

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Restores the value of the include_path configuration option

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