Codegenerator

function codeGenerator($length) {
  $string = "";
  $chars = "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890_-";
  for($i = 0; $i < $length; $i++) {
    $string .= $chars[rand(0, strlen($chars)-1)];
  }
  return $string;
}