(PHP 5 >= 5.3.0, PHP 7) Tells whether the stream supports locking.

(PHP 5, PHP 7) Retrieve list of registered streams

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Alias of

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Attach a filter to a stream

(PHP 4, PHP 5) Alias of

(PHP 5 >= 5.3.0, PHP 7) Set the default stream context

(PHP 5, PHP 7) Create an Internet or Unix domain server socket

(PHP 5, PHP 7) Retrieve list of registered filters

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Retrieve options for a stream/wrapper/context

(PHP 5 >= 5.1.0, PHP 7) Remove a filter from a stream