/** * 随机获取数据 * @param string $num抽取条数 * @param string $table表名 * @param string $where查询条件 * @return array*/function tt_random_data($num,$table,$where=[]){$pk = Db::name($table)->getPK();//获取主键$countcus = Db::name($table)->where($where)->field($pk)->select();//查询数据$con = '';$qu = '';foreach($countcus as $v=>$val){$con.= $val[$pk].'|';}$array = explode("|",$con);$countnum = count($array)-1;for($i = 0;$i <= $num;$i++){$sunum = mt_rand(0,$countnum);$qu.= $array[$sunum].',';}$list = Db::name($table)->where($pk,'in',$qu)->select();return $list;}