<?php

/**
 * 字符串处理
 *
 * example：
 * <pre>
 *
 * </pre>
 *
 * @name QLib_Utils_StringHelper
 * @version 
 * @package QLib.Utils.StringHelper
 * @author peter.zyliu peter.zyliu@gmail.com
 * @since 1.0
 */

class Lib_Utils_StringHelper 
{
	/**
	 *
	 * 按字来切分字符 (UTF－8截字)
	 *
	 * @param String $str
	 * @param Integer $length
	 * @param Integer $start
	 * @param String $encoding
	 * @return String
	 */
	public static function mbSubstr($str, $length, $start = 0, $suffix = '...', $encoding = "utf-8") 
	{
		$str = trim($str);
		if (mb_strlen($str) == $length) 
		{
			return $str;
		}
		$strs = mb_substr($str, $start, $length, $encoding);
		if ((mb_strlen($str) / 3) > $length) 
		{
			$strs .= $suffix;
		}
		return $strs;
	}
	
	/**
	 * 按字节来切分字符
	 *
	 * @param String $str
	 * @param Integer $length
	 * @param Integer $start
	 * @param String $encoding
	 */
	public static function mbStrcut($str, $length, $start = 0, $encoding = "utf-8") 
	{
		return mb_strcut($str, $start, $length, $encoding);
	}
	
	/**
	 * 判定是否是某个编码的合法字串
	 *
	 * @param String $str
	 * @param String $coding
	 * @return String
	 */
	public static function isValidCoding($str, $coding = "UTF-8") 
	{
		return mb_check_encoding($str, $coding);
	}
	
	/**
	 * gbk 转 unicode
	 *
	 * @param String $text
	 * @return String
	 */
	public static function baseGbkToUnicode($str) 
	{
		$rtext = "";
		preg_match_all("/[\x81-\xfe]?./", $str, $regs);
		foreach ($regs[0] as $v) 
		{
			if (ord($v) > 127) 
			{
				$rtext .= "&#" . base_convert(bin2hex(iconv("gb2312", "ucs-2", $v)), 16, 10) . ";";
			}
			else 
			{
				$rtext .= $v;
			}
		}
		return $rtext;
	}
	
	/**
	 * 转换16进制到UTF－8
	 *
	 * @param String $text
	 * @return String
	 */
	public static function unicode16ToUtf($text) 
	{
		preg_match_all("/\%u([a-zA-Z0-9]{0,4}+)/", $text, $regs);
		foreach ($regs[0] as $v) 
		{
			$to = "&#" . base_convert(str_replace("%u", "", $v), 16, 10) . ";";
			$text = str_replace($v, $to, $text);
		}
		return $text;
	}
	
	/**
	 * utf 装 gbk
	 *
	 * @param String $str
	 * @return String
	 */
	public static function utfToGbk($str) 
	{
		$info = mb_convert_encoding($str, "gbk", "utf-8");
		return $info;
	}
	
	/**
	 * UTF8 转换
	 * @param String $str
	 * @return String
	 */
	public static function gbkToUtf8($str) 
	{
		$str = mb_convert_encoding($str, "utf-8", "gbk");
		$convmap = array(
			0x0080, 
			0xffff, 
			0x0000, 
			0xffff
		);
		//0x0026, 0x0026, 0x0000, 0xffff);  <-这个是转&号为&amp;
		$str = mb_encode_numericentity($str, $convmap, "utf-8");
		return $str;
	}
	
	/**
	 * Hex2Str 解码
	 * @param String $msg
	 * @return String
	 */
	public static function Hex2Str($msg, $isString = true) 
	{
		$outstr = "";
		$l = strlen($msg);
		if ($l % 2 != 0) {
			$l--;
		}
		$par = "H" . $l;
		$outstr = pack($par, $msg);
		if ($isString == false) {
			return $outstr;
		}
		return $this->gbkToUtf8($this->unicodeToGBK($outstr));
	}
	
	/**
	 * Str2Hex 编码
	 * @param String $msg
	 * @return String
	 */
	public static function Str2Hex($msg) 
	{
		$str = unpack("C*", $this->utf8TOunicode($msg));
		$result = "";
		for ($i = 1; $i <= count($str); $i++) 
		{
			$tmp = DecHex($str[$i]);
			if (strlen($tmp) == 1) 
			{
				$tmp = "0" . $tmp;
			}
			$result .= $tmp;
		}
		return $result;
	}
	
	/**
	 * 转换编码
	 * @param String $str
	 * @return String
	 */
	public static function gbkToUnicode($str) 
	{
		return mb_convert_encoding($str, "unicode", "gbk");
	}
	
	/**
	 * 转换成GBK
	 * @param String $str
	 * @return String
	 */
	public static function unicodeToGBK($str) 
	{
		return mb_convert_encoding($str, "gbk", "unicode");
	}
	
	/**
	 * unicode 转UTF-8
	 * @param String $str
	 * @return String
	 */
	public static function unicodeTOUtf8($str) 
	{
		return mb_convert_encoding($str, "utf-8", "unicode");
	}
	
	/**
	 * UTF-8转unicode
	 *
	 * @param String $str
	 * @return String
	 */
	public static function utf8TOunicode($str) 
	{
		return mb_convert_encoding($str, "unicode", "utf-8");
	}
	
	/**
	 * 对addslashes处理中文字符出现错误的解决
	 *
	 * @param string  $string 要转义的字符串
	 * @param boolean $escape: 是否对中文特殊处理，默认为false
	 * @return string
	 */
	public static function addslash($string, $escape = false) 
	{
		if (!$escape) 
		{
			return addslashes($string);
		}
		$string = ereg_replace("([^\xA1-\xFE])[\x5c]", "\\1\\", $string);
		$string = str_replace("\\", "\\\\", $string);
		$string = str_replace("'", "\\'", $string);
		$string = str_replace("\"", "\\\"", $string);
		return $string;
	}
	
	/**
	 * CRC转换为16进制
	 *
	 * @param String $str
	 * @return String
	 */
	public static function crc2Dechex($val) 
	{
		return dechex(crc32($val));
	}
	
	/**
	 * 对象进行编码crc32有符号
	 *
	 * @param String $val
	 * @return String
	 */
	public static function obj2Crc2($val)
	{
		$crc = crc32($val);
		return $crc;
	}
	
	/**
	 * 格式化html代码的 (包括中文)
	 *
	 * @param String $str
	 * @return String
	 */
	public static function htmlEntities($str) 
	{
		return htmlentities($str);
	}
	
	/**
	 * 格式化html代码的 (不包括中文)
	 *
	 * @param string $str
	 * @return String
	 */
	public static function htmlSpecialChars($str) 
	{
		return htmlspecialchars($str, ENT_QUOTES,'utf-8');
	}
	
	/**
	 * 解码html代码
	 * 
	 * @return string $str
	 * @return string
	 */
	public static function htmlSpecialCharsDecode($str)
	{
		return htmlspecialchars_decode($str, ENT_QUOTES);
	} 
	
	/**
	 *
	 * 按字来切分字符 (UTF－8截字) 并 格式化代码
	 *
	 * @param String $str
	 * @param Integer $length
	 * @param Integer $start
	 * @param String $suffix
	 * @param String $encoding
	 * @return String
	 */
	public static function mbSubstrHtml($str, $length, $start = 0, $suffix = '...', $encoding = "utf-8")
    {
		return self::htmlSpecialChars(self::mbSubstr($str, $length, $start, $suffix, $encoding));
	}
	
	/**
	 * 替换数据
	 *
	 * @param String $str
	 * @param String $pattern
	 * @param String $replacement
	 * @return String
	 */
	public static function pregReplace($str, $pattern = '/\[(.*?)\]/i', $replacement = '') {
		return preg_replace($pattern, $replacement, $str);
	}
	
	/**
	 * 获取字符串首字母, 可传入汉字，字母 ，数字
	 *
	 * @param String $string
	 * @return String
	 */
	public static function getFirstLetter($string) 
	{
		$string = @iconv('UTF-8', 'gbk', $string); //字符编码转换
		$dict = array(
			'a' => 0xB0C4, 
			'b' => 0xB2C0, 
			'c' => 0xB4ED, 
			'd' => 0xB6E9, 
			'e' => 0xB7A1, 
			'f' => 0xB8C0, 
			'g' => 0xB9FD, 
			'h' => 0xBBF6, 
			'j' => 0xBFA5, 
			'k' => 0xC0AB, 
			'l' => 0xC2E7, 
			'm' => 0xC4C2, 
			'n' => 0xC5B5, 
			'o' => 0xC5BD, 
			'p' => 0xC6D9, 
			'q' => 0xC8BA, 
			'r' => 0xC8F5, 
			's' => 0xCBF9, 
			't' => 0xCDD9, 
			'w' => 0xCEF3, 
			'x' => 0xD188, 
			'y' => 0xD4D0, 
			'z' => 0xD7F9
		);
		$letter = substr($string, 0, 1);
		if ((ord($letter) > 64 && ord($letter) < 91) || (ord($letter) > 96 && ord($letter) < 123))
		{
			return strtoupper($letter{0});
		}
		elseif ($letter >= '0' && $letter <= '9')
		{
			return $letter;
		}
		else if ($letter >= chr(0x81) && $letter <= chr(0xfe)) 
		{
			$num = hexdec(bin2hex(substr($string, 0, 2)));
			foreach ($dict as $k => $v) 
			{
				if ($v >= $num)
					break;
			}
			return strtoupper($k);
		}
		else 
		{
			return false;
		}
	}
	/**
	 * 去除html标签
	 *
	 * @param String $string
	 * @return String
	 */
	public static function pregReplaceHtml($string) 
	{
		if (empty($string)) 
		{
			return $string;
		}
		$pattern = array(
			"'<script[^>]*?>[\s\S]*?</script>'si", 
			"'<[\/\!]*?[^<>]*?>'si", 
			"'<iframe[^>]*?>[\s\S]*?</iframe>'si"
		);
		$replacement = '';
		return preg_replace($pattern, $replacement, $string);
	}
	
	/**
	 * 去除危险标签
	 *
	 * @param String $string
	 * @return String
	 */
	public static function replaceDangerCode($string) 
	{
		if (empty($string)) 
		{
			return $string;
		}
		$pattern = array(
			"'<style[^>]*?>[\s\S]*?</style>'si", 
			"'<iframe[^>]*?>[\s\S]*?</iframe>'si", 
			"'<script[^>]*?>[\s\S]*?</script>'si", 
			"'<link[^>]*?/>'si"
		);
		$replacement = '';
		return preg_replace($pattern, $replacement, $string);
	}
	
	/**
	 * SEO
	 *
	 * @param String $string
	 * @return String
	 */
	public static function toSEO($string) 
	{
		$search = array(
			' ', 
			'%20', 
			'&', 
			'?', 
			'@', 
			'\/'
		);
		$replace = array(
			'_', 
			'_', 
			'_', 
			'_', 
			'_', 
			'_'
		);
		$string = str_replace($search, $replace, $string);
		return $string;
	}
	
	/**
	 * 字符替换
	 *
	 * @param String $document
	 * @return String
	 */
	public static function striptext($document) {
		$search = array(
			"'<script[^>]*?>.*?</script>'si",  // strip out javascript
			"'<[\/\!]*?[^<>]*?>'si",  // strip out html tags
			"'([\r\n])[\s]+'",  // strip out white space
			"'&(quot|#34|#034|#x22);'i",  // replace html entities
			"'&(amp|#38|#038|#x26);'i",  // added hexadecimal values
			"'&(lt|#60|#060|#x3c);'i", 
			"'&(gt|#62|#062|#x3e);'i", 
			"'&(nbsp|#160|#xa0);'i", 
			"'&(iexcl|#161);'i", 
			"'&(cent|#162);'i", 
			"'&(pound|#163);'i", 
			"'&(copy|#169);'i", 
			"'&(reg|#174);'i", 
			"'&(deg|#176);'i", 
			"'&(#39|#039|#x27);'", 
			"'&(euro|#8364);'i",  // europe
			"'&a(uml|UML);'",  // german
			"'&o(uml|UML);'", 
			"'&u(uml|UML);'", 
			"'&A(uml|UML);'", 
			"'&O(uml|UML);'", 
			"'&U(uml|UML);'", 
			"'&szlig;'i"
		);
		$replace = array(
			"", 
			"", 
			"\\1", 
			"\"", 
			"&", 
			"<", 
			">", 
			" ", 
			chr(161), 
			chr(162), 
			chr(163), 
			chr(169), 
			chr(174), 
			chr(176), 
			chr(39), 
			chr(128), 
			"?", 
			"?", 
			"?", 
			"?", 
			"?", 
			"?", 
			"?"
		);
		
		return preg_replace($search, $replace, $document);
	}
	
	public static function stripTags($html) 
	{
		$search = array(
			'&nbsp;', 
			"'<script[^>]*?>.*?</script>'si", 
			"'<[\/\!]*?[^<>]*?>'si", 
			"'([\r\n])[\s]+'", 
			"'&(quot|#34|#034|#x22);'i", 
			"'&(amp|#38|#038|#x26);'i", 
			"'&(lt|#60|#060|#x3c);'i", 
			"'&(gt|#62|#062|#x3e);'i", 
			"'&(nbsp|#160|#xa0);'i", 
			"'&(iexcl|#161);'i", 
			"'&(cent|#162);'i", 
			"'&(pound|#163);'i", 
			"'&(copy|#169);'i", 
			"'&(reg|#174);'i", 
			"'&(deg|#176);'i", 
			"'&(#39|#039|#x27);'", 
			"'&(euro|#8364);'i", 
			"'&a(uml|UML);'", 
			"'&o(uml|UML);'", 
			"'&u(uml|UML);'", 
			"'&A(uml|UML);'", 
			"'&O(uml|UML);'", 
			"'&U(uml|UML);'", 
			"'&szlig;'i", 
			//"　"
		);
		return trim(str_replace($search, '', strip_tags($html)));
	}
	
	/**
	 * 
	 * 得到一个博客的唯一编码
	 * 
	 * @param integer $uid 用户编码
	 * @return string
	 */
	public static function getBlogUuid($uid = '')
	{
		return uniqid ();
	}
	
	/**
	 * 
	 * 得到一个短链接的唯一编码
	 * 
	 * @param integer $uid 用户编码
	 * @return string
	 */
	public static function getSUrlUuid($uid = '')
	{
		$sUrl =  uniqid ('', true);
		return str_replace('.','', $sUrl);
	}
	
	/**
	 * 转换长链接到短链接
	 * 
	 * @param string $url
	 * @return string
	 */
	public static function getShortlink($url) 
    {
		$url_int = sprintf ( '%u', crc32 ( $url ) );
		$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890';
		$ret = '';
		while ( $url_int > 0 ) 
		{
			$ret .= substr ( $str, $url_int % 62, 1 );
			$url_int = ( int ) floor ( $url_int / 62 );
		}
		return $ret;
	}
	
	/**
	 * 过滤中文字符串
	 * @param $string
	 * @param $length
	 * @param $charset
	 * @param $etc
	 * @return unknown_type
	 */
	public static  function substr_filter($string, $length = 280, $charset = 'UTF-8', $etc = '...') 
	{
		$filter_string = strip_tags(htmlspecialchars_decode($string));
		if (mb_strwidth ( $filter_string , 'UTF-8' ) <= $length)
		{
			return $filter_string;
		}
		return  mb_strimwidth ( $filter_string, 0, $length, '', $charset ) . $etc ;
	}
	/**
	 * 切割中文字符串
	 * @param $string
	 * @param $length
	 * @param $charset
	 * @param $etc
	 * @return unknown_type
	 */
	public static function substr_cn($string, $length = 280, $charset = 'UTF-8', $etc = '...') 
	{
		if (mb_strwidth (  $string , 'UTF-8' ) <= $length)
			return $string;
		return  mb_strimwidth (  $string , 0, $length, '', $charset ) . $etc ;
	}
	
    /**
     *转换中文首字母的函数 
     * 
     * @param string $_String
     * @param boolean $isInitial 是否只返回首字母
     * @param string $_Code 编码格式 utf8 or gb2312
     * @return string
     */
    public static function Pinyin($_String, $isInitial = true, $_Code = "utf8") {
        $_DataKey = "a|ai|an|ang|ao|ba|bai|ban|bang|bao|bei|ben|beng|bi|bian|biao|bie|bin|bing|bo|bu|ca|cai|can|cang|cao|ce|ceng|cha" . "|chai|chan|chang|chao|che|chen|cheng|chi|chong|chou|chu|chuai|chuan|chuang|chui|chun|chuo|ci|cong|cou|cu|" . "cuan|cui|cun|cuo|da|dai|dan|dang|dao|de|deng|di|dian|diao|die|ding|diu|dong|dou|du|duan|dui|dun|duo|e|en|er" . "|fa|fan|fang|fei|fen|feng|fo|fou|fu|ga|gai|gan|gang|gao|ge|gei|gen|geng|gong|gou|gu|gua|guai|guan|guang|gui" . "|gun|guo|ha|hai|han|hang|hao|he|hei|hen|heng|hong|hou|hu|hua|huai|huan|huang|hui|hun|huo|ji|jia|jian|jiang" . "|jiao|jie|jin|jing|jiong|jiu|ju|juan|jue|jun|ka|kai|kan|kang|kao|ke|ken|keng|kong|kou|ku|kua|kuai|kuan|kuang" . "|kui|kun|kuo|la|lai|lan|lang|lao|le|lei|leng|li|lia|lian|liang|liao|lie|lin|ling|liu|long|lou|lu|lv|luan|lue" . "|lun|luo|ma|mai|man|mang|mao|me|mei|men|meng|mi|mian|miao|mie|min|ming|miu|mo|mou|mu|na|nai|nan|nang|nao|ne" . "|nei|nen|neng|ni|nian|niang|niao|nie|nin|ning|niu|nong|nu|nv|nuan|nue|nuo|o|ou|pa|pai|pan|pang|pao|pei|pen" . "|peng|pi|pian|piao|pie|pin|ping|po|pu|qi|qia|qian|qiang|qiao|qie|qin|qing|qiong|qiu|qu|quan|que|qun|ran|rang" . "|rao|re|ren|reng|ri|rong|rou|ru|ruan|rui|run|ruo|sa|sai|san|sang|sao|se|sen|seng|sha|shai|shan|shang|shao|" . "she|shen|sheng|shi|shou|shu|shua|shuai|shuan|shuang|shui|shun|shuo|si|song|sou|su|suan|sui|sun|suo|ta|tai|" . "tan|tang|tao|te|teng|ti|tian|tiao|tie|ting|tong|tou|tu|tuan|tui|tun|tuo|wa|wai|wan|wang|wei|wen|weng|wo|wu" . "|xi|xia|xian|xiang|xiao|xie|xin|xing|xiong|xiu|xu|xuan|xue|xun|ya|yan|yang|yao|ye|yi|yin|ying|yo|yong|you" . "|yu|yuan|yue|yun|za|zai|zan|zang|zao|ze|zei|zen|zeng|zha|zhai|zhan|zhang|zhao|zhe|zhen|zheng|zhi|zhong|" . "zhou|zhu|zhua|zhuai|zhuan|zhuang|zhui|zhun|zhuo|zi|zong|zou|zu|zuan|zui|zun|zuo";
        $_DataValue = "-20319|-20317|-20304|-20295|-20292|-20283|-20265|-20257|-20242|-20230|-20051|-20036|-20032|-20026|-20002|-19990" . "|-19986|-19982|-19976|-19805|-19784|-19775|-19774|-19763|-19756|-19751|-19746|-19741|-19739|-19728|-19725" . "|-19715|-19540|-19531|-19525|-19515|-19500|-19484|-19479|-19467|-19289|-19288|-19281|-19275|-19270|-19263" . "|-19261|-19249|-19243|-19242|-19238|-19235|-19227|-19224|-19218|-19212|-19038|-19023|-19018|-19006|-19003" . "|-18996|-18977|-18961|-18952|-18783|-18774|-18773|-18763|-18756|-18741|-18735|-18731|-18722|-18710|-18697" . "|-18696|-18526|-18518|-18501|-18490|-18478|-18463|-18448|-18447|-18446|-18239|-18237|-18231|-18220|-18211" . "|-18201|-18184|-18183|-18181|-18012|-17997|-17988|-17970|-17964|-17961|-17950|-17947|-17931|-17928|-17922" . "|-17759|-17752|-17733|-17730|-17721|-17703|-17701|-17697|-17692|-17683|-17676|-17496|-17487|-17482|-17468" . "|-17454|-17433|-17427|-17417|-17202|-17185|-16983|-16970|-16942|-16915|-16733|-16708|-16706|-16689|-16664" . "|-16657|-16647|-16474|-16470|-16465|-16459|-16452|-16448|-16433|-16429|-16427|-16423|-16419|-16412|-16407" . "|-16403|-16401|-16393|-16220|-16216|-16212|-16205|-16202|-16187|-16180|-16171|-16169|-16158|-16155|-15959" . "|-15958|-15944|-15933|-15920|-15915|-15903|-15889|-15878|-15707|-15701|-15681|-15667|-15661|-15659|-15652" . "|-15640|-15631|-15625|-15454|-15448|-15436|-15435|-15419|-15416|-15408|-15394|-15385|-15377|-15375|-15369" . "|-15363|-15362|-15183|-15180|-15165|-15158|-15153|-15150|-15149|-15144|-15143|-15141|-15140|-15139|-15128" . "|-15121|-15119|-15117|-15110|-15109|-14941|-14937|-14933|-14930|-14929|-14928|-14926|-14922|-14921|-14914" . "|-14908|-14902|-14894|-14889|-14882|-14873|-14871|-14857|-14678|-14674|-14670|-14668|-14663|-14654|-14645" . "|-14630|-14594|-14429|-14407|-14399|-14384|-14379|-14368|-14355|-14353|-14345|-14170|-14159|-14151|-14149" . "|-14145|-14140|-14137|-14135|-14125|-14123|-14122|-14112|-14109|-14099|-14097|-14094|-14092|-14090|-14087" . "|-14083|-13917|-13914|-13910|-13907|-13906|-13905|-13896|-13894|-13878|-13870|-13859|-13847|-13831|-13658" . "|-13611|-13601|-13406|-13404|-13400|-13398|-13395|-13391|-13387|-13383|-13367|-13359|-13356|-13343|-13340" . "|-13329|-13326|-13318|-13147|-13138|-13120|-13107|-13096|-13095|-13091|-13076|-13068|-13063|-13060|-12888" . "|-12875|-12871|-12860|-12858|-12852|-12849|-12838|-12831|-12829|-12812|-12802|-12607|-12597|-12594|-12585" . "|-12556|-12359|-12346|-12320|-12300|-12120|-12099|-12089|-12074|-12067|-12058|-12039|-11867|-11861|-11847" . "|-11831|-11798|-11781|-11604|-11589|-11536|-11358|-11340|-11339|-11324|-11303|-11097|-11077|-11067|-11055" . "|-11052|-11045|-11041|-11038|-11024|-11020|-11019|-11018|-11014|-10838|-10832|-10815|-10800|-10790|-10780" . "|-10764|-10587|-10544|-10533|-10519|-10331|-10329|-10328|-10322|-10315|-10309|-10307|-10296|-10281|-10274" . "|-10270|-10262|-10260|-10256|-10254";
        $_TDataKey = explode ( "|", $_DataKey );
        $_TDataValue = explode ( "|", $_DataValue );
        
        $_Data = (PHP_VERSION >= "5.0") ? array_combine ( $_TDataKey, $_TDataValue ) : self::_Array_Combine ( $_TDataKey, $_TDataValue );
        arsort ( $_Data );
        reset ( $_Data );
        
        if ($_Code != "gb2312")
            $_String = self::_U2_Utf8_Gb ( $_String );
        $_Res = "";
        for($i = 0; $i < strlen ( $_String ); $i ++) {
            $_P = ord ( substr ( $_String, $i, 1 ) );
            if ($_P > 160) {
                $_Q = ord ( substr ( $_String, ++ $i, 1 ) );
                $_P = $_P * 256 + $_Q - 65536;
            }
            $_Res .= self::_Pinyin ( $_P, $_Data, $isInitial );
        }
        return preg_replace ( "/[^a-z0-9]*/", "", $_Res );
    }
    private static function _U2_Utf8_Gb($_C) {
        $_String = "";
        if ($_C < 0x80)
            $_String .= $_C;
        elseif ($_C < 0x800) {
            $_String .= chr ( 0xC0 | $_C >> 6 );
            $_String .= chr ( 0x80 | $_C & 0x3F );
        } elseif ($_C < 0x10000) {
            $_String .= chr ( 0xE0 | $_C >> 12 );
            $_String .= chr ( 0x80 | $_C >> 6 & 0x3F );
            $_String .= chr ( 0x80 | $_C & 0x3F );
        } elseif ($_C < 0x200000) {
            $_String .= chr ( 0xF0 | $_C >> 18 );
            $_String .= chr ( 0x80 | $_C >> 12 & 0x3F );
            $_String .= chr ( 0x80 | $_C >> 6 & 0x3F );
            $_String .= chr ( 0x80 | $_C & 0x3F );
        }
        return iconv ( "UTF-8", "GB2312", $_String );
    }
    
    private static function _Array_Combine($_Arr1, $_Arr2) {
        for($i = 0; $i < count ( $_Arr1 ); $i ++)
            $_Res [$_Arr1 [$i]] = $_Arr2 [$i];
        return $_Res;
    }
    private static function _Pinyin($_Num, $_Data, $isInitial) {
        if ($_Num > 0 && $_Num < 160)
            return chr ( $_Num );
        elseif ($_Num < - 20319 || $_Num > - 10247)
            return "";
        else {
            foreach ( $_Data as $k => $v ) {
                if ($v <= $_Num)
                    break;
            }
            if ($isInitial)
                $k = substr ( $k, 0, 1 ); //是否只显示首写
            return $k;
        }
    }
    /**
     * 将URI转为UTF-8编码格式
     *
     * @param string $word
     * @return string
     */
    public static function toUtf8($word) {
        $word = rawurldecode ( $word );
        $curchar = mb_detect_encoding ( $word, 'UTF-8,CP936,EUC-CN,BIG-5,EUC-TW' );
        if ($curchar != 'UTF-8') {
            $word = mb_convert_encoding ( $word, 'UTF-8', $curchar );
        }
        if (preg_match ( '/%u/i', $word )) {
            $word = self::unescape ( $word );
        }
        return $word;
    }
    public static function unescape($str) {
        preg_match_all ( "/%u.{4}|&#x.{4};|&#d+;|.+/U", $str, $r );
        $ar = $r [0];
        foreach ( $ar as $k => $v )
            if (substr ( $v, 0, 2 ) == "%u" && strlen ( $v ) == 6)
                $ar [$k] = iconv ( "UCS-2", "UTF-8", pack ( "H4", substr ( $v, - 4 ) ) );
        return join ( "", $ar );
    }
    
    /**
     * 截取完整英文
     * 
     * @param string $string
	 * @param int $length
	 * @param $etc
     * @return string
     */
	public static function substr_full_en($string, $length = 280, $etc = '...')  
    { 
        $chars = $string;  
        $tmp = $i = $n = $m = $l = 0;
        $length /= 2;
        if (mb_strwidth (  $string , 'UTF-8' ) <= $length)
            return $string;
        do
        {  
            if (preg_match ("/[0-9a-zA-Z]/", @$chars[$i])) //纯英文 
            { 
                $m++; 
                $tmp++; 
            }  
            else //非英文字节
            {
                $n++;
                $tmp = 0;   
            } 
            $k = $n/3 + $m/2;  
            $l = $n/3 + $m;//最终截取长度；$l = $n/3+$m
            $i++;  
        } while($k < $length); 
        if(preg_match ("/[0-9a-zA-Z]/", @$chars[$i-1]))//英文是不是完整的
        {
            $l = $l- $tmp;
        }
        $str = mb_substr($string, 0, $l,'utf-8');//保证不会出现乱码   
        return $str ==$string ?  $str: $str.$etc;
    } 
    
    /**
     * 获取货币
     * 
     * @param string $currency
     * @return string
     */
	public static function getCurrency($currency)
	{
	   switch ($currency)
	   {
            case 'BRL' : $currency_symbol = '&#82;&#36;'; break;
            case 'AUD' : $currency_symbol = '&#36;'; break;
            case 'CAD' : $currency_symbol = '&#36;'; break;
            case 'MXN' : $currency_symbol = '&#36;'; break;
            case 'NZD' : $currency_symbol = '&#36;'; break;
            case 'HKD' : $currency_symbol = '&#36;'; break;
            case 'SGD' : $currency_symbol = '&#36;'; break;
            case 'USD' : $currency_symbol = '&#36;'; break;
            case 'EUR' : $currency_symbol = '&euro;'; break;
            case 'CNY' : $currency_symbol = '&yen;'; break;
            case 'JPY' : $currency_symbol = '&yen;'; break;
            case 'TRY' : $currency_symbol = '&#84;&#76;'; break;
            case 'NOK' : $currency_symbol = '&#107;&#114;'; break;
            case 'ZAR' : $currency_symbol = '&#82;'; break;
            case 'CZK' : $currency_symbol = '&#75;&#269;'; break;
            case 'MYR' : $currency_symbol = '&#82;&#77;'; break;
            case 'DKK' : $currency_symbol = '&#107;&#114;'; break;
            case 'HUF' : $currency_symbol = '&#70;&#116;'; break;
            case 'ILS' : $currency_symbol = '&#8362;'; break;
            case 'PHP' : $currency_symbol = '&#8369;'; break;
            case 'PLN' : $currency_symbol = '&#122;&#322;'; break;
            case 'SEK' : $currency_symbol = '&#107;&#114;'; break;
            case 'CHF' : $currency_symbol = '&#67;&#72;&#70;'; break;
            case 'TWD' : $currency_symbol = '&#78;&#84;&#36;'; break;
            case 'THB' : $currency_symbol = '&#3647;'; break;
            case 'GBP' : $currency_symbol = '&pound;'; break;
            default    : $currency_symbol = '&yen;'; break;
	   }
	   return $currency_symbol;
	}
}