记录日志,达到文件大小,自动新建文件

    function write($message,$level='ERROR',$type=3,$destination='',$extra='') {
    	$LOG_PATH = './';
    	$LOG_FILE_SIZE = 100;
        $now = date('[ c ]');
        $type = $type?$type:3;
        if($type == 3) { // 文件方式记录日志
            if(empty($destination))
                $destination = $LOG_PATH.date('y-m-d').'.log';
            //检测日志文件大小，超过配置大小则备份日志文件重新生成
            if(is_file($destination) && floor($LOG_FILE_SIZE) <= filesize($destination) )
                  rename($destination,dirname($destination).'/'.basename($destination).'-'.time().'.log');
        }
        error_log("{$now} {$level}: {$message}\r\n", $type,$destination,$extra );
        //clearstatcache();
    }
    write('dd');