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數(shù)據(jù)庫操作，{$tezheng}變量不能被解析。頁面報錯，解析為空。

            $tezheng=$r['features'];   //結(jié)果是str
            $maxinfo=  \Phpcmf\Service::M()->db->query("select max(startnum),min(startnum) from dr_1_zhgl where (userstate = 1) and (bignum = 1) 
            and (features =  {$tezheng}) ")->getResultArray();