Descriptionresource fsockopen ( string hostname [, int port [, int &errno [, string &errstr [, float timeout]]]] )
Initiates a socket connection to the resource specified by
The socket will by default be opened in blocking mode. You can switch it to non-blocking mode by using stream_set_blocking().
If you have compiled in OpenSSL support, you may prefix the
hostnamewith either ssl:// or tls:// to use an SSL or TLS client connection over TCP/IP to connect to the remote host.
The port number.
If provided, holds the system level error number that occurred in the system-level connect() call.
If the value returned in
errnois 0 and the function returned FALSE, it is an indication that the error occurred before the connect() call. This is most likely due to a problem initializing the socket.
The error message as a string.
The connection timeout, in seconds.
Note: If you need to set a timeout for reading/writing data over the socket, use stream_set_timeout(), as the
timeoutparameter to fsockopen() only applies while connecting the socket.
Example 2. Using UDP connection
The example below shows how to retrieve the day and time from the UDP service "daytime" (port 13) in your own machine.
Note: Depending on the environment, the Unix domain or the optional connect timeout may not be available.
UDP sockets will sometimes appear to have opened without an error, even if the remote host is unreachable. The error will only become apparent when you read or write data to/from the socket. The reason for this is because UDP is a "connectionless" protocol, which means that the operating system does not try to establish a link for the socket until it actually needs to send or receive data.
Note: When specifying a numerical IPv6 address (e.g. fe80::1) you must enclose the IP in square brackets. For example, tcp://[fe80::1]:80.
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