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

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Create a socket (endpoint for communication)

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

(PECL ssh2 >= 0.9.0) Rename a remote file

(PECL geoip >= 1.0.2) Get the Internet Service Provider (ISP) name

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

(PHP 5, PHP 7) Generate URL-encoded query string

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

(PHP 5 >= 5.5.0, PHP 7) Read a message int