(PHP 5 >= 5.1.0, PHP 7) Converts a human readable IP address to its packed in_addr representation

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Clears the error on the socket or the last error code

(PHP 4, PHP 5, PHP 7) Get Internet service which corresponds to port and protocol

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

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Add URL rewriter values

(PECL ssh2 >= 0.10) Remove an authorized publickey

(PHP 4, PHP 5, PHP 7) Open connection to system logger

(PHP 4, PHP 5, PHP 7) Check DNS records corresponding to a given Internet host name or IP address

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Alias of