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_chdir()
在 FTP 服务器上改变当前目录ftp_pwd()
返回当前目录名
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, "~"); ?>