<?php 
defined('IN_HS') or exit('Access Denied');
function convert_encoding($from_encoding, $to_encoding, $str_or_array)
{
	if(!is_array($str_or_array) && empty($str_or_array)) return "";
	$from_encoding = strtolower($from_encoding);
	$to_encoding = strtolower($to_encoding);
	$converarray = array();
	$from_encoding = str_replace("gbk","gb2312",$from_encoding);
	$to_encoding = str_replace("gbk","gb2312",$to_encoding);

	if($from_encoding == $to_encoding) return $str_or_array;
	
	//mb_convert_encoding() and iconv() cannot convert the codepage:big5--gbk
	if(($from_encoding == "big5" && $to_encoding == "gb2312")||($from_encoding == "gb2312" && $to_encoding == "big5")) $flag = false;
	else $flag = true;

	if(function_exists('mb_convert_encoding') && $to_encoding != 'pinyin' && $flag)
	{
		if(!is_array($str_or_array))
		{
			return mb_convert_encoding($str_or_array, $to_encoding, $from_encoding);
		}
		else
		{
			foreach($str_or_array as $key => $val)
			{
				$converarray[$key] = mb_convert_encoding($val, $to_encoding, $from_encoding);
			}
			return $converarray;
		}
	}
	else if(function_exists('iconv') && $to_encoding != 'pinyin' &&$flag)
	{
		if(!is_array($str_or_array))
		{
			return iconv($from_encoding, $to_encoding."//IGNORE", $str_or_array);
		}
		else
		{
			foreach($str_or_array as $key => $val)
			{
				$converarray[$key] = iconv($from_encoding, $to_encoding."//IGNORE", $val);
			}
			return $converarray;
		}
	}
	else
	{
		require_once HS_ROOT."/include/chinese.class.php";
		$chs = new chinese();

		$from_encoding = str_replace("utf-8","utf8",$from_encoding);
		$from_encoding = str_replace("gbk","gb2312",$from_encoding);		
		$to_encoding = str_replace("utf-8","utf8",$to_encoding);
		$to_encoding = str_replace("gbk","gb2312",$to_encoding);
		
		$charset=array("utf8","gb2312","big5","unicode","pinyin");
		if(!in_array($from_encoding,$charset))
		{
			return "The codepage-".$from_encoding." is not support!";
		}
		else if(!in_array($to_encoding,$charset))
		{
			return "The codepage-".$to_encoding." is not support!";
		}
		else 
		{
			$from_encoding = strtoupper($from_encoding);
			$to_encoding = strtoupper($to_encoding);
			if(!is_array($str_or_array))
			{
				return $chs->Convert($from_encoding,$to_encoding,$str_or_array);
			}
			else
			{
				foreach($str_or_array as $key => $val)
				{
					$converarray[$key] = $chs->Convert($from_encoding,$to_encoding,$val);
				}
				return $converarray;
			}
		}
	}
}
?>