(PHP 4, PHP 5, PHP 7) Generate a system log message

(PHP 5, PHP 7) Fetches all the headers sent by the server in response to a HTTP request

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Reads a maximum of length bytes from a socket

(PHP 4 >= 4.3.0, PHP 5, PHP 7) List all output handlers in use

(PHP 5 >= 5.4.0, PHP 7) Import a stream resource

(PHP 5, PHP 7) Returns a list of response headers sent (or ready to send)

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Binds a name to a socket

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Closes a socket resource

(PECL ssh2 >= 0.9.0) Remove a directory bool

(PHP 4, PHP 5, PHP 7) Open Internet or Unix domain socket connection