stream_socket_recvfrom

    (PHP 5, PHP 7, PHP 8)

    stream_socket_recvfrom — Receives data from a socket, connected or not

    Beschreibung

    stream_socket_recvfrom(
        resource$socket,
        int$length,
        int$flags = 0,
        ?string&$address = null
    ): string|false

    stream_socket_recvfrom() accepts data from a remote socket up to length bytes.

    Parameter-Liste

    socket

    The remote socket.

    length

    The number of bytes to receive from the socket.

    flags

    The value of flags can be any combination of the following:

    Possible values for flags
    STREAM_OOB Process OOB (out-of-band) data.
    STREAM_PEEK Retrieve data from the socket, but do not consume the buffer. Subsequent calls to fread() or stream_socket_recvfrom() will see the same data.
    address

    If address is provided it will be populated with the address of the remote socket.

    Rückgabewerte

    Returns the read data, as a string,Bei einem Fehler wird false zurückgegeben..

    Beispiele

    Beispiel #1 stream_socket_recvfrom() example

    <?php

    $server = stream_socket_server('tcp://127.0.0.1:1234');


    $socket = stream_socket_accept($server);


    echo "Received Out-Of-Band: '" . stream_socket_recvfrom($socket, 1500, STREAM_OOB) . "'\n";


    echo "Data: '" . stream_socket_recvfrom($socket, 1500, STREAM_PEEK) . "'\n";


    echo "Data: '" . stream_socket_recvfrom($socket, 1500) . "'\n";


    fclose($socket);
    fclose($server);
    ?>

    Anmerkungen

    Hinweis:

    If a message received is longer than the length parameter, excess bytes may be discarded depending on the type of socket the message is received from (such as UDP).

    Hinweis:

    Calls to stream_socket_recvfrom() on socket-based streams, after calls to buffer-based stream functions (like fread() or stream_get_line()) read data directly from the socket and bypass the stream buffer.

    Siehe auch

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