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    eio_ftruncate

    (PECL eio >= 0.0.1dev)

    eio_ftruncate — Truncate a file

    Description

    eio_ftruncate(
        mixed $fd,
        int $offset = 0,
        int $pri = EIO_PRI_DEFAULT,
        callable $callback = NULL,
        mixed $data = NULL
    ): resource

    eio_ftruncate() causes a regular file referenced by fd file descriptor to be truncated to precisely length bytes.

    Parameters

    fd

    Stream, Socket resource, or numeric file descriptor.

    offset

    Offset from beginning of the file

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

    See Also

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