PHP - FTP Upload via cURL

<?php
foreach (glob("/path/to/*.zip") as $filename){  
    $ch = curl_init();
    $remotefile = basename($filename);
    $fp = fopen($filename, 'r');  
    curl_setopt($ch, CURLOPT_URL,  'ftp://ftp_login:password@ftp.domain.com/'.$remotefile);  
    curl_setopt($ch, CURLOPT_UPLOAD, 1);
    curl_setopt($ch, CURLOPT_INFILE, $fp);
    curl_setopt($ch, CURLOPT_INFILESIZE, filesize($filename));
    curl_exec ($ch);
    $error_no = curl_errno($ch);
    curl_close ($ch);
    fclose($fp);
    if ($error_no == 0) {
        $error = 'File uploaded succesfully.';  
    } else {
        $error = 'File upload error.';  
    }
}
?>