PHP uses ftp function to implement simple upload function

/**
 ftp upload file
 link: bbs.it-home.org
 date: 2013/2/25
*/
$ftp_server = "192.168.8.8";
$ftp_user = "test123";
$ftp_pass = "yourpassword";
// set up a connection or die
$conn_id = ftp_connect($ftp_server) or die("Couldn't connect to $ftp_server");
$login_result = ftp_login($conn_id, $ftp_user, $ftp_pass);
if ((!$conn_id) || (!$login_result)) {
        echo "FTP connection has failed!";
        echo "Attempted to connect to $ftp_server for user $ftp_user_name";
        exit;
    } else {
        echo "Connected to $ftp_server, for user $ftp_user_name";
    }
// try to login
 $filename=date('Ymd').".xml";
 $source_file="/var/mydata/".$filename;  //源地址
 echo $source_file;
 $destination_file="/admin/ftplog/".$filename;  //目标地址
 $upload = ftp_put($conn_id, $destination_file, $source_file, FTP_BINARY) or die("Couldn't connect to $ftp_server");
 ftp_quit($conn_id);
 if (!$upload) {
        echo "FTP upload has failed!";
    } else {
        echo "Uploaded $source_file to $ftp_server as $destination_file";
    }
ftp_close($conn_id);
?>