ftp_cdup

(PHP 4, PHP 5)

ftp_cdup切换到当前目录的父目录

说明

bool ftp_cdup ( resource $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

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User Contributed Notes 3 notes

up
1
rowie at free dot fr
5 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
1
tom p
9 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
-1
Anonymous
6 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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