자바스크립트 escape unescape php 구현함수

<?
function toString($text){
   return iconv('UTF-16LE', 'UHC', chr(hexdec(substr($text[1], 2, 2))).chr(hexdec(substr($text[1], 0, 2))));
}

function toUnicode($word) {
   $word = iconv('UHC', 'UTF-16LE', $word);
   return strtoupper(dechex(ord(substr($word,1,1))).dechex(ord(substr($word,0,1))));
}

function unescape($text){
   return urldecode(preg_replace_callback('/%u([[:alnum:]]{4})/', 'toString', $text));
}

function escape($str) {
   $len = strlen($str);
   for($i=0,$s='';$i<$len;$i++) {
      $ck = substr($str,$i,1);
      $ascii = ord($ck);
      if($ascii > 127) $s .= '%u'.toUnicode(substr($str, $i++, 2));
      else $s .= (in_array($ascii, array(42, 43, 45, 46, 47, 64, 95))) ? $ck : '%'.strtoupper(dechex($ascii));
   }
   return $s;
}

//함수 테스트

$string = "%uC990%uAC70%uC6B4%20%uD558%uB8E8%uB418%uC138%uC694...%5E%5E/";
echo unescape($string);
echo "<br /><br />";

echo escape("즐거운 하루되세요...^^/");

?>