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    ftp_cdup

    (PHP 4, PHP 5, PHP 7, PHP 8)

    ftp_cdup — Changes to the parent directory

    Description

    ftp_cdup(FTP\Connection $ftp): bool

    Changes to the parent directory.

    Parameters

    ftp

    An FTP\Connection instance.

    Return Values

    Returns true on success or false on failure.

    Changelog

    Version Description
    8.1.0 The ftp parameter expects an FTP\Connection instance now; previously, a resource was expected.

    Examples

    Example #1 ftp_cdup() example

    <?php
    // set up basic connection
    $ftp = ftp_connect($ftp_server);

    // login with username and password
    $login_result = ftp_login($ftp, $ftp_user_name, $ftp_user_pass);

    // change the current directory to html
    ftp_chdir($ftp, 'html');

    echo     ftp_pwd($ftp); // /html

    // return to the parent directory
    if (ftp_cdup($ftp)) {
    echo     "cdup successful\n";
    } else {
    echo     "cdup not successful\n";
    }

    echo     ftp_pwd($ftp); // /

    ftp_close($ftp);
    ?>

    See Also

    • ftp_chdir() - Changes the current directory on a FTP server
    • ftp_pwd() - Returns the current directory name

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    User Contributed Notes 3 notes

    up
    1
    tom p
    19 years ago
    I used a recursive cdup function until i realised i could navigate to the user's home directory from any location using ~:

    <? ftp_chdir($connid, "~"); ?>
    up
    0
    rowie at free dot fr
    15 years ago
    ftp_cdup can only up to the parent and if you want test a directory that is not a child then you can't with ftp_cdup ;)
    up
    0
    Anonymous
    16 years ago
    The below example doesn't seem to work on a windows based machine so I use this trick instead

    <?php

    $aPath     = explode('/',ftp_pwd($conn_id));
    $sHomeDir = str_repeat('../', count($aPath) - 1);

    ftp_chdir($conn_id, $sHomeDir);

    ?>
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