(PHP 4, PHP 5, PHP 7) Converts an long integer address into a string in (IPv4) Internet standard dotted format

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

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

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

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Get a list of IPv4 addresses corresponding to a given Internet host name

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

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

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

(PHP 5, PHP 7) Returns a list of response headers sent (or ready to send)