ftp_cdup
(PHP 4, PHP 5, PHP 7)
ftp_cdup — 切换到当前目录的父目录
说明
$ftp_stream
)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
Example #1 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
用户评论:
[#1] rowie at free dot fr [2009-03-11 02:30:24]
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 ;)
[#2] Anonymous [2008-05-07 09:01:21]
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, $sHomeDir);
?>
[#3] tom p [2005-12-07 16:01:08]
I used a recursive cdup function until i realised i could navigate to the user's home directory from any location using ~:
<?php ftp_chdir($connid, "~"); ?>