ftp_chdir

(PHP 4, PHP 5, PHP 7)

ftp_chdir — 在 FTP 服务器上改变当前目录

说明

bool ftp_chdir ( resource $ftp_stream , string $directory )

将当前目录切换为指定的目录。

参数

ftp_stream

FTP 连接的标识符。

directory

目标目录。

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE。如果切换目录失败，PHP 还会发出一条警告。

范例

Example #1 ftp_chdir() 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);

// check connection
if ((!$conn_id) || (!$login_result)) {
    die("FTP connection has failed !");
}

echo "Current directory: " . ftp_pwd($conn_id) . "\n";

// try to change the directory to somedir
if (ftp_chdir($conn_id, "somedir")) {
    echo "Current directory is now: " . ftp_pwd($conn_id) . "\n";
} else {
    echo "Couldn't change directory\n";
}

// close the connection 
ftp_close($conn_id); 
?>

参见

User Contributed Notes

info at swiftyexpress dot com 26-Nov-2008 10:12
Works like the other functions in this page's notes, but this one doesn't make use of a global FTP connection, so it takes parameters like the other functions in the extension

<?php
function ftp_directory_exists($ftp, $dir)
{
    // Get the current working directory
    $origin = ftp_pwd($ftp);
   
    // Attempt to change directory, suppress errors
    if (@ftp_chdir($ftp, $dir))
    {
        // If the directory exists, set back to origin
        ftp_chdir($ftp, $origin);   
        return true;
    }

    // Directory does not exist
    return false;
}
?>


[NOTE BY danbrown AT php DOT net: As the contributor mentions, the original function was noted here by (h3 AT valleyfield DOT net) on 13-JUL-2007.]
neil at 11 out of 10 16-Apr-2008 02:58
Thanks to h3 at valleyfield dot net

Same function with some minor changes and comments added

FTP function checks if a directory exists

<?php
function ftp_is_dir( $dir ) {
    global $ftpcon;
    // get current directory
    $original_directory = ftp_pwd( $ftpcon );
    // test if you can change directory to $dir
    // suppress errors in case $dir is not a file or not a directory
    if ( @ftp_chdir( $ftpcon, $dir ) ) {
        // If it is a directory, then change the directory back to the original directory
        ftp_chdir( $ftpcon, $original_directory );
        return true;
    }
    else {
        return false;
    }       
}
?>