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  • ftp_cdup()

    (PHP 4, PHP 5, PHP 7)

    切换到当前目录的父目录

    说明

    ftp_cdup(resource $ftp_stream): bool

    切换目录至当前目录的父目录(上级目录)。

    参数

    $ftp_stream

    FTP 连接的标识符。

    返回值

    成功时返回TRUE,或者在失败时返回FALSE

    范例

    ftp_cdup()例子

    <?php 
    // set up basic connection 
    $conn_id = ftp_connect($ftp_server); 
    // login with username and password 
    $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass); 
    // change the current directory to html 
    ftp_chdir($conn_id, 'html'); 
    echo ftp_pwd($conn_id); // /html 
    // return to the parent directory 
    if (ftp_cdup($conn_id)) { 
      echo "cdup successful\n"; 
    } else { 
      echo "cdup not successful\n"; 
    } 
    echo ftp_pwd($conn_id); // / 
    ftp_close($conn_id); 
    ?>
    

    参见

    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 ;)
    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);
    ?>
    
    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, "~"); ?>
    

    上篇:ftp_append()

    下篇:ftp_chdir()