if(!function_exists('str_split')) {
  function str_split($string,$string_length=1) {
    if(strlen($string)>$string_length || !$string_length) {
       do {
          $c = strlen($string);
          $parts[] = substr($string,0,$string_length);
          $string = substr($string,$string_length);
       } while($string !== false);
    } else {
       $parts = array($string);
    }
    return $parts;
  }
}