(PHP 4 >= 4.3.2, PHP 5, PHP 7) Register a URL wrapper implemented as a PHP class

(PHP 5, PHP 7) Copies data from one stream to another

(PHP 5 >= 5.3.0, PHP 7) Retrieves parameters from a context

(PHP 5, PHP 7) Accept a connection on a socket created by

(PHP 5, PHP 7) Retrieve the name of the local or remote sockets

(PHP 5 >= 5.2.1, PHP 7) Shutdown a full-duplex connection

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Retrieves header/meta data from streams/file pointers