(PHP 4, PHP 5, PHP 7) Gets the current PHP version
(PHP 4, PHP 5, PHP 7) Gets the version of the current Zend engine
(PHP 4, PHP 5, PHP 7) Gets the value of an environment variable
(PHP 7) Reclaims memory used by the Zend Engine memory manager
(PHP 4, PHP 5, PHP 7) Gets the current resource usages
(PHP 4, PHP 5, PHP 7) Gets time of last page modification
(PHP 7) Returns active resources array get_resources
(PHP 4, PHP < 5.5) Gets the Zend guid string
(PHP 4 >= 4.3.2, PHP 5, PHP 7) Returns the amount of memory allocated to PHP
(PHP 4, PHP 5, PHP 7) Outputs information about PHP's configuration
Page 2 of 6