PHP ʖ²ἯTH º󍋼/A copy ˵÷ =ד 1. copy() =ד if (!copy($file, $file.'.bak')) {print ("failed to copy $file... br \n");} ¾¯¸漯B º󍋼/A ưµ㼯A clearstatcache ɏһ¼¶ delete