ecshop写文件日志

 
/**
     * 日志调试
     * @param string $msg
     */
    function log($msg){
        if(defined('ROOT_PATH' && defined('DATA_DIR'))){
            $logfilename = ROOT_PATH . DATA_DIR;
        } else {
            $logfilename = dirname(__FILE__);
        }
        $logfilename .= '/debug_' . date('Y_m_d') . '.log';
        $str = $msg . "\\n\\n";
        @file_put_contents($logfilename, $str, FILE_APPEND);
    }