$str=‘ximing’;
s q l 2 = " I N S E R T I N T O ‘ b i a o b a i 2 ‘ ( ‘ i d ‘ , ‘ n a m e ‘ , ‘ c o l o r ‘ , ‘ c o n t e n t s ‘ ) V A L U E S ( ′ 1 9 ′ , ( ′ sql2 = "INSERT INTO `biaobai2` (`id`, `name`, `color`, `contents`) VALUES ('19', (' sql2="INSERTINTO‘biaobai2‘(‘id‘,‘name‘,‘color‘,‘contents‘)VALUES(′19′,(′str’), ‘black’, ‘xiandai’)";
注意变量格式数据(‘变量名’)