(PHP 4 >= 4.1.0, PHP 5, PHP 7) Queries the local side of the given socket which may either result in host/port

(PECL ssh2 >= 0.9.0) Retrieve fingerprint of remote server

(PHP 4, PHP 5, PHP 7) Clean (erase) the output buffer and turn off output buffering

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Get current buffer contents and delete current output buffer

(PHP 4, PHP 5, PHP 7) Send a raw HTTP header

(PECL ssh2 >= 0.10) Add an authorized publickey

(PHP 4, PHP 5, PHP 7) Get MX records corresponding to a given Internet host name

(PECL ssh2 >= 0.9.0) Stat a symbolic link

(PECL ssh2 >= 0.9.0) Create a directory bool

(PECL geoip >= 1.0.4) Returns the time zone for some country and region code combo