(PHP 4, PHP 5, PHP 7) Gets the value of a configuration option
(PHP 4, PHP 5, PHP 7) Sets the value of an environment variable
(PHP 4, PHP 5, PHP 7) Gets the name of the owner of the current PHP script
(PHP 4, PHP < 5.5) Gets the Zend guid string
(PHP 4, PHP 5, PHP 7) Gets PHP's process ID int
(PHP 4 >= 4.3.0, PHP 5, PHP 7) Sets the include_path configuration option
(PHP 4 >= 4.3.0, PHP 5, PHP 7) Return a list of .ini files parsed from the additional ini dir
(PHP 4, PHP 5 < 5.5) Gets the logo guid string
(PHP 5 >= 5.3.0, PHP 7) Forces collection of any existing garbage cycles
(PHP 4, PHP 5, PHP 7) Gets PHP script owner's UID
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