(PHP 5 >= 5.4.0, PHP 7) Get or Set the HTTP response code

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

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

(PHP 5 >= 5.4.0, PHP 7) Call a header function

(PHP 4, PHP 5 < 5.4.0) Initializes all syslog related variables

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

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

(PHP >= 5.3.0) Gets the host name string gethostname

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

(PHP 5, PHP 7) Alias of