(PECL geoip >= 1.0.3) Get the two letter continent code

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Queries the remote side of the given socket which may either result in host/port

(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) Alias of

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

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Reads a maximum of length bytes from a socket

(PECL ssh2 >= 0.10) List currently authorized publickeys

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Binds a name to a socket

(PHP 4 >= 4.0.4, PHP 5, PHP 7) ob_start callback function to gzip output buffer

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Closes a socket resource