eio_sendfile

    (PECL eio >= 0.0.1dev)

    eio_sendfile — Transfer data between file descriptors

    Description

    eio_sendfile(
        mixed $out_fd,
        mixed $in_fd,
        int $offset,
        int $length,
        int $pri = ?,
        callable $callback = ?,
        string $data = ?
    ): resource

    eio_sendfile() copies data between one file descriptor and another. See SENDFILE(2) man page for details.

    Parameters

    out_fd

    Output stream, Socket resource, or file descriptor. Should be opened for writing.

    in_fd

    Input stream, Socket resource, or file descriptor. Should be opened for reading.

    offset

    Offset within the source file.

    length

    Number of bytes to copy.

    pri

    The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or null. If null passed, pri internally is set to EIO_PRI_DEFAULT.

    callback

    callback function is called when the request is done. It should match the following prototype:

    void callback(mixed $data, int $result[, resource $req]);
    data

    is custom data passed to the request.

    result

    request-specific result value; basically, the value returned by corresponding system call.

    req

    is optional request resource which can be used with functions like eio_get_last_error().

    data

    Arbitrary variable passed to callback.

    Return Values

    eio_sendfile() returns request resource on success, or false on failure.

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