(PECL geoip >= 1.0.1) Returns detailed information about all GeoIP database types

(PECL geoip >= 0.2.0) Get the country code and region

(PECL geoip >= 1.1.0) Get the second level domain name

(PECL ssh2 >= 0.9.0) Return list of negotiated methods

(PHP 4, PHP 5, PHP 7) Get protocol number associated with protocol name

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Shuts down a socket for receiving, sending, or both

(PHP 5, PHP 7) Fetch DNS Resource Records associated with a hostname

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Opens a socket on port to accept connections

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Return a string describing a socket error

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Creates a pair of indistinguishable sockets and stores them in an array