(PHP 4, PHP 5, PHP 7) Release a semaphore bool

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns the return code of a terminated child

(PHP 4, PHP 5, PHP 7) Removes a variable from shared memory

(PHP 4, PHP 5, PHP 7) Perform a global regular expression match

(PECL solr >= 0.9.2) Specify the regular expression for fragmenting

(PHP 5 >= 5.1.0, PHP 7) Construct a LimitIterator

(PHP 5 <= 5.3.0, PECL ming SVN) Draws a line

(PHP 5 >= 5.3.0, PHP 7) Rewinds all attached iterator instances

(PECL mongo >=1.0.1) Sets whether this cursor will timeout

(Unknown) Defines a list of up to 4 $_SERVER variables that should be modified for execution