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# ftp_cdup

(PHP 3>= 3.0.13, PHP 4 , PHP 5)

ftp_cdup -- Changes to the parent directory

## Description

bool ftp_cdup ( resource ftp_stream)

Changes to the parent directory.

示範 1.ftp_cdup() example
`<?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); ?>`

成功回傳`TRUE`失敗回傳`FALSE`。

See also ftp_chdir().

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