(PHP 4, PHP 5, PHP 7) Flush (send) the output buffer and turn off output buffering

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Sets nonblocking mode for file descriptor fd

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns the last error on the socket

(PECL geoip >= 0.2.0) Returns the detailed City information found in the GeoIP Database

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

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

(PECL geoip >= 1.1.0) Get the Autonomous System Numbers (ASN)

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