Thinkphp缓存代理CacheDelegate类处理redis

/**
 * CacheDelegate()
 *
 * @param mixed $cacheHandler
 * @param mixed $cacheName
 * @param mixed $cacheParams
 * @param mixed $GetFunctionDataArray
 * @param mixed $GetFunctionParamArray
 * @param mixed $DealFunctionDataArray
 * @param mixed $DealFunctionParamArray
 * @param mixed $UpdateCache
 * @return
 */
function CacheDelegate($cacheHandler, $CacheName,$cacheParams=array(), $GetFunctionDataArray = array(), $GetFunctionParamArray =
		array(), $DealFunctionDataArray = array(), $DealFunctionParamArray = array(), $UpdateCache = false)
{
	$cacheValue = '';
	if (isset($CacheName))
	{
		$cacheSetting = C('CACHETABLE');
		$cacheSetting =$cacheSetting[$CacheName];
		$cacheKey = vsprintf($cacheSetting['cacheKey'], $cacheParams );
		if (empty($cacheKey)){
			if (APP_STATUS=='DEV_config'){
				throw_exception("缓存配置文件cachetable.php中，$CacheName 的配置错误");
			}
			return null;
		}
		$expire = $cacheSetting['expire'] ? $cacheSetting['expire'] : null;

		$keyCached = $cacheHandler->exists($cacheKey);
		if ($keyCached){
			$cacheValue = $cacheHandler->get($cacheKey);
		}
		// keyCached为false, 表示缓存不存在， 需要重新读数据库;
		if ( !$keyCached || $UpdateCache)
		{

			if (isset($GetFunctionDataArray) && is_callable($GetFunctionDataArray))
			{
				$cacheValue = call_user_func_array($GetFunctionDataArray, $GetFunctionParamArray);

				if (isset($cacheValue)){
					$cacheHandler->set($cacheKey,$cacheValue,$expire);
				}
			}
		}
		
		if (isset($DealFunctionDataArray) && is_callable($DealFunctionDataArray))
		{
			$DealFunctionParamArray = array_merge(array($cacheValue), $DealFunctionParamArray);
			$TmpcacheValue = call_user_func_array($DealFunctionDataArray, $DealFunctionParamArray);

			if (isset($cacheValue))
			{
				$cacheHandler->set($cacheKey, $TmpcacheValue, $expire);
				$cacheValue = $TmpcacheValue;
			}
		}
	}
	return $cacheValue;
}


/**
 * 字符串截取，支持中文和其他编码
 * @static
 * @access public
 * @param string $str 需要转换的字符串
 * @param string $start 开始位置
 * @param string $length 截取长度
 * @param string $charset 编码格式
 * @param string $suffix 截断显示字符
 * @return string
 */
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) {
	if(function_exists("mb_substr"))
		$slice = mb_substr($str, $start, $length, $charset);
	elseif(function_exists('iconv_substr')) {
		$slice = iconv_substr($str,$start,$length,$charset);
		if(false === $slice) {
			$slice = '';
		}
	}else{
		$re['utf-8']   = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
		$re['gb2312'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
		$re['gbk']    = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
		$re['big5']   = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
		preg_match_all($re[$charset], $str, $match);
		$slice = join("",array_slice($match[0], $start, $length));
	}
	$fix='';
	if(strlen($slice) < strlen($str)){
		$fix='...';
	}
	return $suffix ? $slice.$fix : $slice;
}


/**
 * 获取来源IP
 * @return Ambigous <string, unknown>
 */
function get_ip(){
	if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
		$ip = getenv("HTTP_CLIENT_IP");
	else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
		$ip = getenv("HTTP_X_FORWARDED_FOR");
	else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
		$ip = getenv("REMOTE_ADDR");
	else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
		$ip = $_SERVER['REMOTE_ADDR'];
	else
		$ip = "unknown";
	return($ip);
}