<?php
/**
 * HTML實體編號與非ASCII字符串相互轉換類
 * Date: 2016-09-07
 * Author: fdipzone
 * Ver: 1.0
 *
 * Func:
 * public encode 字符串轉為HTML實體編號
 * public decode HTML實體編號轉為字符串
 * private _convertToHtmlEntities 轉換為HTML實體編號處理
 */
class HtmlEntitie{ // class start
 public static $_encoding = 'UTF-8';
 /**
  * 字符串轉為HTML實體編號
  * @param String $str  字符串
  * @param String $encoding 編碼
  * @return String
  */
 public static function encode($str, $encoding='UTF-8'){
  self::$_encoding = $encoding;
  return preg_replace_callback('|[^\x00-\x7F]+|', array(__CLASS__, '_convertToHtmlEntities'), $str);
 }
 /**
  * HTML實體編號轉為字符串
  * @param String $str  HTML實體編號字符串
  * @param String $encoding 編碼
  * @return String
  */
 public static function decode($str, $encoding='UTF-8'){
  return html_entity_decode($str, null, $encoding);
 }
 /**
  * 轉換為HTML實體編號處理
  * @param Mixed $data 待處理的數據
  * @param String
  */
 private static function _convertToHtmlEntities($data){
  if(is_array($data)){
   $chars = str_split(iconv(self::$_encoding, 'UCS-2BE', $data[0]), 2);
   $chars = array_map(array(__CLASS__, __FUNCTION__), $chars);
   return implode("", $chars);
  }else{
   $code = hexdec(sprintf("%02s%02s;", dechex(ord($data {0})), dechex(ord($data {1})) ));
   return sprintf("%s;", $code);
  }
 }
} // class end
?>