(PHP 4, PHP 5, PHP 7) Return the contents of the output buffer

(PHP 5 >= 5.5.0, PHP 7) Calculate message buffer size

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

(PECL geoip >= 1.1.0) Set a custom directory for the GeoIP database.

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Runs the select() system call on the given arrays of sockets with a specified

(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

(PHP 4, PHP 5, PHP 7) Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer

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

(PECL geoip >= 0.2.0) Get the Internet connection type