ftp_chdir

(PHP 4, PHP 5, PHP 7, PHP 8)

ftp_chdir — 在 FTP 服务器上改变当前目录

说明

ftp_chdir(FTP\Connection $ftp, string $directory): bool

参数

ftp: FTP\Connection 实例。
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。

更新日志

版本	说明
8.1.0	现在 `ftp` 参数接受 FTP\Connection 实例，之前接受 resource。

示例

示例 #1 ftp_chdir() 例子

<?php

// set up basic connection
$ftp = ftp_connect($ftp_server); 

// login with username and password
$login_result = ftp_login($ftp, $ftp_user_name, $ftp_user_pass); 

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

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

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

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

参见

ftp_cdup() - 切换到当前目录的父目录
ftp_pwd() - 返回当前目录名

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＋添加备注

用户贡献的备注 2 notes

down

neil at 11 out of 10 ¶

16 years ago

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;
    }        
} 
?>

down

info at swiftyexpress dot com ¶

16 years ago

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.]