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 ( resource $ftp_stream , string $directory ) : bool

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

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

User Contributed Notes

info at swiftyexpress dot com 26-Nov-2008 01:12


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 05:58


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;

    }        

} 

?>