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Programming PHP, 3rd Edition by Peter MacIntyre, Kevin Tatroe, Rasmus Lerdorf

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Name

fsockopen

Synopsis

resource fsockopen(string host, int port[, int error[,
   string message[, float 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.

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