Programming PHP, 2nd Edition

Name

fsockopen

Synopsis

int fsockopen(string host, int port[, int error[, string message[, double timeout]]])

Opens a TCP or UDP connection to a remote host on a specific port. By default, TCP is used; to connect via UDP, host must begin with the protocol udp://. If specified, timeout indicates the length of time in seconds to wait before timing out.

If the connection is successful, a virtual file pointer is returned, which can be used with functions such as fgets( ) and fputs( ). If the connection fails, false is returned. If error and message are supplied, they are set to the error number and error string, respectively.