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

(PECL ssh2 >= 0.9.0) Request a file via SCP

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

(PHP 4, PHP 5, PHP 7) Get the Internet host name corresponding to a given IP address

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Flush the output buffer, return it as a string and turn off output buffering

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

(PECL ssh2 >= 0.9.0) Remove a directory bool

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

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

(PECL ssh2 >= 0.9.0) Create a symlink bool