Is it possible to reverse engineer this code to generate valid key for the code? [closed]

I want to know how secure the validation code is on a scale of 0-10?
$k = str_replace(‘-‘, ”, $j);
$s = substr($k, 0, 8);
$c = substr($k, 8, 2);
$a = substr($k, 10, 2);
$l = substr($k, 12, 2);
$p = substr($k, 14, 2);
$n = substr($k, 16, 2… Continue reading Is it possible to reverse engineer this code to generate valid key for the code? [closed]