/** * 取得日志类实例 * @param string $logname psys,panalyse,pexam,pitem试 * //1,系统管理 psys 2,题库试卷 pitem 3,在线测试 pexam 4,考试分析 panalyse * @return object */ public static function getInstance($logname = 'pweb') { if (null === self::$_logname) { self::$_logname = $logname; } if (null === self::$_instance) { self::$_instance = new XLogger(); } if ($logname !== self::$_logname) { self::$_logname = $logname; self::$_instance = new self(); } return self::$_instance; }