Could not able to put the file in FTP Server

I'm trying to put the xml file in FTP Server using php and laravel.

I could not able to upload the file in the Server.

Here it's my code in php

    $fileName = 'test.xml';
    $filePath = public_path($fileName);
    $conn_id = ftp_connect(env('FTP_HOST'));
    ftp_login($conn_id, env('FTP_USERNAME'), env('FTP_PASSWORD'));
    ftp_put($conn_id, '/files/test/', $filePath, FTP_ASCII);

But it is showing error as

    ERROR:
    ftp_put(): Could not create file.

I have tried in Laravel also

     $fileName = 'test.xml';
     \Storage::disk('ftp')->put($fileName, fopen(public_path($fileName), 'r+'));

I have configured the driver in filesystems

'ftp' => [
    'driver' => 'ftp',
    'host' => '12.12.12.12', 
    'username' => `user`,
    'password' => 'password',

],

Expected : Need to put the xml file in ftp server which is in project public path.