帝国CMS显示指定时间内更新的信息数量，如1天内列新多少条信息： 用sql调用
12小时：<?=$empire->gettotal("select count(*) as total from phome_ecms_表 where newstime>UNIX_TIMESTAMP()-24*3600")?>
6小时：<?=$empire->gettotal("select count(*) as total from phome_ecms_表 where newstime>UNIX_TIMESTAMP()-6*3600")?>
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