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

(PHP 4, PHP 5, PHP 7) Send a cookie bool setcookie

(PHP 4, PHP 5, PHP 7) Checks if or where headers have been sent

(PHP 4, PHP 5, PHP 7) Get the IPv4 address corresponding to a given Internet host name

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

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

(PHP 5, PHP 7) Alias of

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

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

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