=sql("FRDemo","SELECT * FROM STSCORE where CLASSNO = '"+$class+"' ",3,4)
考虑参数为空不过滤这个条件,如何加进去
=if(len($class)=0,sql("FRDemo","SELECT * FROM STSCORE",3,4),sql("FRDemo","SELECT * FROM STSCORE where CLASSNO = '"+$class+"' ",3,4))