Use PHP to connect to FTP and backup all folder contents

I'm building a custom web app that stores the FTP and MySQL settings for the websites I manage for clients. My goal is not only to store the settings for reference, but to create functionality to assist in doing regular backups.

I've got the MySQL backup functio开发者_开发问答nality working great, as it connects to the remote databases, creates a dump and sends it to my browser to download locally.

BUT... what is the best way to connect to a remote FTP and download all the contents of a specific folder to my local computer?

Any suggestions would be amazing!

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This example from the php manual posted by mroerick might help you.

    <?php 
$ftp_server = "ftp.example.com"; 
$conn_id = ftp_connect ($ftp_server) 
    or die("Couldn't connect to $ftp_server"); 

$login_result = ftp_login($conn_id, "user", "pass"); 
if ((!$conn_id) || (!$login_result)) 
    die("FTP Connection Failed"); 

ftp_sync (".");

ftp_close($conn_id);  

function ftp_sync ($dir) { 

    global $conn_id; 

    if ($dir != ".") { 
        if (ftp_chdir($conn_id, $dir) == false) { 
            echo ("Change Dir Failed: $dir<BR>\r\n"); 
            return; 
        } 
        if (!(is_dir($dir))) 
            mkdir($dir); 
        chdir ($dir); 
    } 

    $contents = ftp_nlist($conn_id, "."); 
    foreach ($contents as $file) { 

        if ($file == '.' || $file == '..') 
            continue; 

        if (@ftp_chdir($conn_id, $file)) { 
            ftp_chdir ($conn_id, ".."); 
            ftp_sync ($file); 
        } 
        else 
            ftp_get($conn_id, $file, $file, FTP_BINARY); 
    } 

    ftp_chdir ($conn_id, ".."); 
    chdir (".."); 

} 
?>