Demo limit

Hello, I've seen you guys here have a demo limiter
example: 5/20 demos have been uploaded so far.

How can I make the same thing on my e107 website?
I'm not a good coder.

just lern php, its a simple script. i dont think xj will post the code here.

something like that:

$folder = '../your folder with demos/';
$max_demos = 20;

$total_demos = null;
if($handle = opendir($folder)) {
	while(false !== ($file = readdir($handle))){
	if(is_file($folder.$file) && $file !== '.' && $file !== '..' && $file !== '.htaccess'){
			$total_demos++;
		}
	}
	closedir($handle);
}

	if($total_demos >= $max_demos){
		$disable_kz = 'disabled="disabled"';
	}

	echo '
	
	'.($total_demos == '' ? '0' : $total_demos).'/'.$max_demos.' demos have been uploaded so far.

	

		Your demo:  
					Map record		
		
	

	';
?>