Sophie: php-manual-en-4.3.0-2mdk noarch

php-manual-en-4.3.0-2mdk.noarch.rpm

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><H1
><A
NAME="function.fsockopen"
></A
>fsockopen</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN60543"
></A
><P
>    (PHP 3, PHP 4 )</P
>fsockopen&nbsp;--&nbsp;
     Open Internet or Unix domain socket connection
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN60546"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>fsockopen</B
> ( string hostname, int port [, int errno [, string errstr [, float timeout]]])<BR
></BR
><P
>&#13;     Initiates a stream connection in the Internet (AF_INET, using TCP
     or UDP) or Unix (AF_UNIX) domain. For the Internet domain, it
     will open a TCP socket connection to
     <TT
CLASS="parameter"
><I
>hostname</I
></TT
> on port
     <TT
CLASS="parameter"
><I
>port</I
></TT
>.  <TT
CLASS="parameter"
><I
>hostname</I
></TT
> may
     in this case be either a fully qualified domain name or an IP
     address. For UDP connections, you need to explicitly specify the
     protocol by prefixing <TT
CLASS="parameter"
><I
>hostname</I
></TT
> with
     '<TT
CLASS="literal"
>udp://</TT
>'. For the Unix domain,
     <TT
CLASS="parameter"
><I
>hostname</I
></TT
> will be used as the path to the
     socket, <TT
CLASS="parameter"
><I
>port</I
></TT
> must be set to 0 in this
     case.  The optional <TT
CLASS="parameter"
><I
>timeout</I
></TT
> can be used to
     set a timeout in seconds for the connect system call.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>
      If you need to set a timeout for reading/writing data over the socket,
      use <A
HREF="function.socket-set-timeout.html"
><B
CLASS="function"
>socket_set_timeout()</B
></A
>, as the <TT
CLASS="parameter"
><I
>timeout</I
></TT
>
      parameter to <B
CLASS="function"
>fsockopen()</B
> only applies while
      connecting the socket.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     As of PHP 4.3.0, if you have compiled in OpenSSL support, you may
     prefix the <TT
CLASS="parameter"
><I
>hostname</I
></TT
> with either
     '<TT
CLASS="literal"
>ssl://</TT
>' or '<TT
CLASS="literal"
>tls://</TT
>' to
     use an SSL or TLS client connection over TCP/IP to connect
     to the remote host.
    </P
><P
>&#13;     <B
CLASS="function"
>fsockopen()</B
> returns a file pointer which may
     be used together with the other file functions (such as
     <A
HREF="function.fgets.html"
><B
CLASS="function"
>fgets()</B
></A
>, <A
HREF="function.fgetss.html"
><B
CLASS="function"
>fgetss()</B
></A
>,
     <A
HREF="function.fputs.html"
><B
CLASS="function"
>fputs()</B
></A
>, <A
HREF="function.fclose.html"
><B
CLASS="function"
>fclose()</B
></A
>, and
     <A
HREF="function.feof.html"
><B
CLASS="function"
>feof()</B
></A
>).
    </P
><P
>&#13;     If the call fails, it will return <TT
CLASS="constant"
><B
>FALSE</B
></TT
> and if the optional
     <TT
CLASS="parameter"
><I
>errno</I
></TT
> and <TT
CLASS="parameter"
><I
>errstr</I
></TT
>
     arguments are present they will be set to indicate the actual
     system level error that occurred in the system-level
     <TT
CLASS="literal"
>connect()</TT
> call. If the value returned in
     <TT
CLASS="parameter"
><I
>errno</I
></TT
> is <TT
CLASS="literal"
>0</TT
> and the
     function returned <TT
CLASS="constant"
><B
>FALSE</B
></TT
>, it is an indication that the error
     occurred before the <TT
CLASS="literal"
>connect()</TT
> call. This is
     most likely due to a problem initializing the socket. Note that
     the <TT
CLASS="parameter"
><I
>errno</I
></TT
> and
     <TT
CLASS="parameter"
><I
>errstr</I
></TT
> arguments will always be passed by
     reference.
    </P
><P
>&#13;     Depending on the environment, the Unix domain or the optional
     connect timeout may not be available.
    </P
><P
>&#13;     The socket will by default be opened in blocking mode.  You can
     switch it to non-blocking mode by using
     <A
HREF="function.socket-set-blocking.html"
><B
CLASS="function"
>socket_set_blocking()</B
></A
>.
     <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN60605"
></A
><P
><B
>Example 1. <B
CLASS="function"
>fsockopen()</B
> Example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="php"
>&#60;?php
$fp = fsockopen ("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)&#60;br&#62;\n";
} else {
    fputs ($fp, "GET / HTTP/1.0\r\nHost: www.example.com\r\n\r\n");
    while (!feof($fp)) {
        echo fgets ($fp,128);
    }
    fclose ($fp);
}
?&#62;</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
     The example below shows how to retrieve the day and time
     from the UDP service "daytime" (port 13) in your own machine.
     <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN60609"
></A
><P
><B
>Example 2. Using UDP connection</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="php"
>&#60;?php
$fp = fsockopen("udp://127.0.0.1", 13, $errno, $errstr);
if (!$fp) {
    echo "ERROR: $errno - $errstr&#60;br&#62;\n";
} else {
    fwrite($fp,"\n");
    echo fread($fp, 26);
    fclose($fp);
}
?&#62;</PRE
></TD
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>
     <DIV
CLASS="warning"
><P
></P
><TABLE
CLASS="warning"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>Warning</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>&#13;        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.
      </P
></TD
></TR
></TABLE
></DIV
>
     <DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>The timeout parameter was introduced in PHP 3.0.9 and
      UDP support was added in PHP 4.
      </P
></BLOCKQUOTE
></DIV
>
     See also <A
HREF="function.pfsockopen.html"
><B
CLASS="function"
>pfsockopen()</B
></A
>, 
     <A
HREF="function.socket-set-blocking.html"
><B
CLASS="function"
>socket_set_blocking()</B
></A
>,
     <A
HREF="function.socket-set-timeout.html"
><B
CLASS="function"
>socket_set_timeout()</B
></A
>, <A
HREF="function.fgets.html"
><B
CLASS="function"
>fgets()</B
></A
>,
     <A
HREF="function.fgetss.html"
><B
CLASS="function"
>fgetss()</B
></A
>, <A
HREF="function.fputs.html"
><B
CLASS="function"
>fputs()</B
></A
>,
     <A
HREF="function.fclose.html"
><B
CLASS="function"
>fclose()</B
></A
>, <A
HREF="function.feof.html"
><B
CLASS="function"
>feof()</B
></A
>, and
     the <A
HREF="ref.curl.html"
>Curl extension</A
>.
    </P
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