$fp = fopen("log.txt","a");flock($fp, LOCK_EX) ;fwrite($fp,"执行日期:".strftime("%Y%m%d%H%M%S",time())."\n"."更改成功".var_export($a, true)."\n");//如果$a为数组的话,用var_export可以让他显示出来flock($fp, LOCK_UN);fclose($fp);//记录后文件产生于你方法的上一级目录