stream_socket_shutdown

    (PHP 5 >= 5.2.1, PHP 7, PHP 8)

    stream_socket_shutdown — Shutdown a full-duplex connection

    Beschreibung

    stream_socket_shutdown(resource $stream, int $mode): bool

    Shutdowns (partially or not) a full-duplex connection.

    Hinweis:

    The associated buffer, or buffers, may or may not be emptied.

    Parameter-Liste

    stream

    An open stream (opened with stream_socket_client(), for example)

    mode

    One of the following constants: STREAM_SHUT_RD (disable further receptions), STREAM_SHUT_WR (disable further transmissions) or STREAM_SHUT_RDWR (disable further receptions and transmissions).

    Rückgabewerte

    Gibt bei Erfolg true zurück. Bei einem Fehler wird false zurückgegeben.

    Beispiele

    Beispiel #1 A stream_socket_shutdown() example

    <?php

    $server     = stream_socket_server('tcp://127.0.0.1:1337');
    $client = stream_socket_client('tcp://127.0.0.1:1337');

    var_dump(fputs($client, "hello"));

    stream_socket_shutdown($client, STREAM_SHUT_WR);
    var_dump(fputs($client, "hello")); // doesn't work now

    ?>

    Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    int(5)

Notice: fputs(): send of 5 bytes failed with errno=32 Broken pipe in test.php on line 9
int(0)

    Siehe auch

    • fclose() - Schließt einen offenen Dateizeiger

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    User Contributed Notes 3 notes

    up
    3
    Daniel J
    3 years ago
    Be wary of using stream_socket_shutdown with a TLS socket. The socket is closed without sending the "close_notify" message required by TLS protocol.

    To correctly close a TLS socket, use fclose() instead, which internally calls OpenSSL's SSL_shutdown() function.
    up
    1
    jgotti
    12 years ago
    Just a note to say that if you encounter problem closing some sockets using fclose in a multi client server, you should really give this one a try.

    Spent a full day trying to resolve this issue using stream_socket_shutdown($clientStream,STREAM_SHUT_RDWR);
    finally do the trick.
    up
    1
    Anonymous
    3 years ago
    As Daniel J has pointed out, stream_socket_shutdown doesn't send the TLS close_notify message. In some instances, it's a preferred function over fclose (to trigger stream_select, for example).

    To use this function correctly with TLS, use stream_socket_enable_crypto($fp, false); before shutting down the socket.
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