   #PHP Manual Stream functions stream_socket_accept
   stream_socket_get_name

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                             stream_socket_client

   (PHP 5 CVS only)
   stream_socket_client --  Open Internet or Unix domain socket
   connection

Description

   resource stream_socket_client ( string remote_socket [, int &errno [,
   string &errstr [, float timeout [, int flags [, resource context]]]]])

   Initiates a stream or datagram connection to the destination specified
   by remote_socket. The type of socket created is determined by the
   transport specified using standard url formatting: transport://target.
   For Internet Domain sockets (AF_INET) such as TCP and UDP, the target
   portion of the remote_socket parameter should consist of a hostname or
   IP address followed by a colon and a port number. For Unix domain
   sockets, the target portion should point to the socket file on the
   filesystem. The optional timeout can be used to set a timeout in
   seconds for the connect system call. flags is a bitmask field which
   may be set to any combination of connection flags. Currently the
   selection of connection flags is limited to
   STREAM_CLIENT_ASYNC_CONNECT and STREAM_CLIENT_PERSISTENT.

     Note: If you need to set a timeout for reading/writing data over
     the socket, use stream_set_timeout(), as the timeout parameter to
     stream_socket_client() only applies while connecting the socket.

   stream_socket_client() returns a stream resource which may be used
   together with the other file functions (such as fgets(), fgetss(),
   fputs(), fclose(), and feof()).

   If the call fails, it will return FALSE and if the optional errno and
   errstr arguments are present they will be set to indicate the actual
   system level error that occurred in the system-level connect() call.
   If the value returned in errno is 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. Note
   that the errno and errstr arguments will always be passed by
   reference.

   Depending on the environment, the Unix domain or the optional connect
   timeout may not be available. A list of available transports can be
   retrieved using stream_get_transports(). See Appendix J for a list of
   built in transports.

   The stream will by default be opened in blocking mode. You can switch
   it to non-blocking mode by using stream_set_blocking().

   Example 1. stream_socket_client() Example
   <?php
   $fp = stream_socket_client("tcp://www.example.com:80", $errno,
   $errstr, 30);
   if (!$fp) {
       echo "$errstr ($errno)<br />\n";
   } else {
       fputs($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\nAccept:
   */*\r\n\r\n");
       while (!feof($fp)) {
           echo fgets($fp, 1024);
       }
       fclose($fp);
   }
   ?>
   The example below shows how to retrieve the day and time from the UDP
   service "daytime" (port 13) in your own machine.

   Example 2. Using UDP connection
   <?php
   $fp = stream_socket_client("udp://127.0.0.1:13", $errno, $errstr);
   if (!$fp) {
       echo "ERROR: $errno - $errstr<br />\n";
   } else {
       fwrite($fp, "\n");
       echo fread($fp, 26);
       fclose($fp);
   }
   ?>

   Warning

   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.

   See also stream_socket_server(), stream_set_blocking(),
   stream_set_timeout(), fgets(), fgetss(), fputs(), fclose(), feof(),
   and the Curl extension.
   ______________________________________________________________________

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