我的代码:
delete costar
where Id not in (
select min(Id)
from costar
group by pnum
)
出于某种原因,我收到了这个通知:
注意:第3行的C:\ UniServerZ \ www \ p7.php中的未定义索引:tw
我不知道代码中的bug在哪里?
答案 0 :(得分:0)
你的数组应该是:
$country = array('zh'=> array('tw'=>"Traditional Chinese",'cn'=>"Simplified Chinese"),'en' =>"English",'jp' =>"Japanese" );
如果zh index
,则覆盖该值'zh'=> array('tw'=>"Traditional Chinese"),'zh'=> array('cn'=>"Simplified Chinese")
答案 1 :(得分:0)
尝试使用这样的方法。避免过度编写数组键。
<?php
$country = array('zh'=> array('tw'=>"Traditional Chinese",'cn'=>"Simplified Chinese"),'en' =>"English",'jp' =>"Japanese" );
echo $country['zh']['tw'];
echo $country['zh']['cn'];
echo $country['en'];
echo $country['jp'];