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mysql+php判断数据表是否存在某个字段 $chaorder='';
if($h = $empire->fetch1("Describe $infotb 'myorder'"))$chaorder='myorder,';
$query="select id,{$chaorder}classid,isurl,titleurl,isqf,havehtml,istop,
isgood,firsttitle,ismember,userid,username,plnum,totaldown,onclick,newstime,
truetime,lastdotime,titlepic,title from ".$infotb.$ewhere." order by ".$doorder." limit $offset,$line";
$sql=$empire->query($query);
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