한글을 자음 모음까지 분리하는 방법이 있나요?

function utf8_strlen($str) { return mb_strlen($str, 'UTF-8'); }function utf8_charAt($str, $num) { return mb_substr($str, $num, 1, 'UTF-8'); }function utf8_ord($ch) {  $len = strlen($ch);  if($len <= 0) return false;  $h = ord($ch{0});  if ($h <= 0x7F) return $h;  if ($h < 0xC2) return false;  if ($h <= 0xDF && $len>1) return ($h & 0x1F) <<  6 | (ord($ch{1}) & 0x3F);  if ($h <= 0xEF && $len>2) return ($h & 0x0F) << 12 | (ord($ch{1}) & 0x3F) << 6 | (ord($ch{2}) & 0x3F);            if ($h <= 0xF4 && $len>3) return ($h & 0x0F) << 18 | (ord($ch{1}) & 0x3F) << 12 | (ord($ch{2}) & 0x3F) << 6 | (ord($ch{3}) & 0x3F);  return false;}function hangul_separa($str) {  $cho = array("ㄱ","ㄲ","ㄴ","ㄷ","ㄸ","ㄹ","ㅁ","ㅂ","ㅃ","ㅅ","ㅆ","ㅇ","ㅈ","ㅉ","ㅊ","ㅋ","ㅌ","ㅍ","ㅎ"); // 초성  $jung = array("ㅏ","ㅐ","ㅑ","ㅒ","ㅓ","ㅔ","ㅕ","ㅖ","ㅗ","ㅘ","ㅙ","ㅚ","ㅛ","ㅜ","ㅝ","ㅞ","ㅟ","ㅠ","ㅡ","ㅢ","ㅣ"); // 중성  $jong = array("","ㄱ","ㄲ","ㄳ","ㄴ","ㄵ","ㄶ","ㄷ","ㄹ","ㄺ","ㄻ","ㄼ","ㄽ","ㄾ","ㄿ","ㅀ","ㅁ","ㅂ","ㅄ","ㅅ","ㅆ","ㅇ","ㅈ","ㅊ","ㅋ"," ㅌ","ㅍ","ㅎ"); // 종성  $result = "";  for ($i=0; $i<utf8_strlen($str); $i++) {    $code = utf8_ord(utf8_charAt($str, $i)) - 44032;    if ($code > -1 && $code < 11172) {              $cho_idx = $code / 588;            $jung_idx = $code % 588 / 28;        $jong_idx = $code % 28;      $result .= $cho[$cho_idx].$jung[$jung_idx].$jong[$jong_idx];    } else {       $result .= utf8_charAt($str, $i);    }  }  return $result;}echo hangul_separa("초성 중성 종성 분리");// => ㅊㅗㅅㅓㅇ ㅈㅜㅇㅅㅓㅇ ㅈㅗㅇㅅㅓㅇ ㅂㅜㄴㄹㅣ