[e:loop={'select * from [!db.pre!]ecms_news where checked=1 order by diggtop desc,id desc limit 8',10,24,0}] <li> <a href=" <?= $bqsr [ titleurl ]?> "> <?= sub ( $bqr [ title ],...
Maybe It is best to just start with the definition of Maybe . It is a union type just like in all the examples here . It is defined like this: 复制代码> type Maybe a = ...